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Transportation Today



Transportation Agitation
Growth Continues Despite Funding Lag

Expansion, continuous improvement and money remain the salient needs of transportation systems today. As the demand for new initiatives grows, so also grow the funding challenges. Yet growth continues and funding happens, just not keeping pace with the expectations of many.

“The safety of our traveling public remains the nation’s highest transportation priority,” says Max Crumit, P.E., PBS&J’s national service director of transportation. “With increased congestion and aging infrastructure, we have some big challenges ahead. Fortunately, with new technologies and creative problem solving, we’re in an excellent position to address the safety and mobility needs of the country.”


Airports Soaring


According to the Airports Council International-North America (ACI-NA), more than 1.46 billion passengers traveled through airports in 2004. Both passenger traffic and cargo grew by 8% and 5% respectively. The Air Transport Association (ATA) is expecting approximately 200 million passenger enplanements on our nation's airlines (400 million passengers through airports) between Memorial Day and Labor Day, which is a 4.1% increase over the same period in 2004.


“The aviation system now has to accommodate record numbers of passengers and it is more important than ever that we have funding to meet airport and system needs,” says ACI-NA president David Z. Plavin. “Unfortunately, the current FAA budget proposal leaves a significant gap in the funding necessary for the entire aviation industry infrastructure. Accordingly, ACI-NA and member airports will work harder than ever this year to get a budget that ensures critical safety and capacity projects are built and passengers receive the level of service they deserve,” he adds.

Port-Ability

Transportation Resources
Airport Consultants Council acconline.org
American Council of Engineering Cos. acec.org
American Road & Transportation Builders Association artba.org
Build Indiana Council buildindianacouncil.org
Floridians for Better Transportation bettertransportation.org
Georgians for Better Transportation ciclt.com/gbt
International Bridge, Tunnel & Turnpike Association ibtta.org
Iowa Good Roads Association 515-284-7410
Kentuckians for Better Transportation kbtnet.org
Maine Better Transportation Association mbtaonline.org
Marylanders for Efficient & Safe Highways 410-947-4726
Minnesota Transportation Alliance transportationalliance.com
Missouri Highway Corridor Council 913-649-3305
New Hampshire Good Roads Association nhgoodroads.org
Ohio Construction Information Association ocianews.com
Oklahoma Good Roads & Transportation Association ogrta.com
Pennsylvania Highway Information Association paconstructors.org
Salt Institute saltinstitute.org
South Carolina Policy & Research Council sctransportation.com
Texas Good Roads & Transportation Association tgrta.com
The Road Information Program tripnet.org
Transportation Development Assn. of Wisconsin tdawisconsin.org

While airports receive most of the federal attention and funding for security and terrorism prevention, U.S. seaports—which support nearly five million jobs and annually handle $2 trillion worth of cargo and more than seven million cruise ship passengers—remain largely under-funded at the federal level. As a result, they must often divert scarce state and local funds to pay for enhanced security, which puts growth and improvement plans on hold.

“We’re encouraged by the intent of the Dec. 21, 2004, presidential directive on marine security, which is to integrate and coordinate maritime-related security efforts, such as the Container Security Initiative and Operation Safe Commerce,” says Kurt Nagle, president and CEO of the American Association of Port Authorities (AAPA). “We’re also encouraged that the budget proposed increases in funding for certain federal programs to enhance maritime security, such as U.S. Coast Guard programs, the Container Security Initiative, radiological detectors and the Customs Trade Partnership Against Terrorism program. However, we’re disappointed that neither the directive nor the proposed budget addresses the need for adequate federal funding assistance. More support is needed to enable state, county and city-run public ports to implement timely facility security enhancements without having to delay or forego other important projects. Funding is critically needed to handle ever-increasing volumes of international commerce.”


Nagle added that AAPA is opposed to the Administration’s FY’06 budget recommendation to lump the Port Security Grant program into the large and nebulous Targeted Infrastructure Protection program, which would further reduce the ability of seaports to compete for limited security grant funding.

Chronic under-funding of the Corps of Engineers’ Civil Works program is also a concern. Insufficient funding for dredging projects has impacted port programs and elicited strong response from many sectors, including lawmakers. Dave Hobson, chairman of the Energy and Water Development Appropriations Subcommittee, spoke out boldly during last year’s COE budget debates. “Over recent years, we have created a huge backlog of work for the Corps,” said Hobson. “We have put too many proj-ects in the Corps’ shopping basket but haven’t given them enough money to pay at checkout. The consequence is that all of these existing projects take longer to complete and cost more, both for the federal taxpayer and the local sponsors.”


Roads & Bridges

Public-private partnerships are leading the way in solving grassroots transportation challenges today. “It’s the most significant trend, head and shoulders above anything else,” says Kern Jacobson, Earth Tech’s director of transportation for North America. He cites the monster Trans-Texas Corridor project (TTC-35), a 50-year, 600-mile program to add private highway capacity from Oklahoma to Mexico. On March 11, 2005, Texas DOT and Cintra-Zachry signed a 50-year contract to plan, design, construct, maintain, operate and collect tolls on TTC-35. Earth Tech is the lead planner and engineer on the project.



Kern Jacobson

“Opportunities arise when private money comes to the table,” says Jacobson. “We see it happening more and more. Nothing else compares to what’s happening in public-private partnerships.” In addition to Texas, Jacobson cites projects and/or initiatives currently under way in Virginia, California, North Carolina, Georgia, Washington, Oregon and Florida. “Public-private partnerships offer sustained programs that are immune to the ups and downs of public funding,” he adds.
Subject 2001
Grade
2005
Grade
Comments
Aviation D D+ Gridlock on America’s runways eased from crisis levels earlier in the decade due to reduced demand and recent modest funding increases. However, air travel and traffic have reportedly surpassed pre-Sept. 11 levels and are projected to grow 4.3% annually through 2015. Airports will face the challenge of accommodating increasing numbers of regional jets and new super-jumbo jets.
Bridges C C Between 2000 and 2003, the percentage of the nation's 590,750 bridges rated structurally deficient or functionally obsolete decreased slightly from 28.5% to 27.1%. However, it will cost $9.4 billion a year for 20 years to eliminate all bridge deficiencies. Long-term underinvestment is compounded by the lack of a Federal transportation program.
Roads D+ D Poor road conditions cost U.S. motorists $54 billion a year in repairs and operating costs—$275 per motorist. Americans spend 3.5 billion hours a year stuck in traffic, at a cost of $63.2 billion a year to the economy. Total spending of $59.4 billion annually is well below the $94 billion needed annually to improve transportation infrastructure conditions nationally. While long-term Federal transportation programs remain unauthorized since expiring on Sept. 30, 2003, the nation continues to shortchange funding for needed transportation improvements.
Source: ASCE Report Card for America’s Infrastructure www.asce.org



  Ten to Watch

Photo Courtesy Orange County Transportation Authority
Garden Grove Freeway (SR-22)

Orange County, CA

Under construction
Completion: December 2006

The $490-million Garden Grove Freeway improvement project on SR-22 is currently the largest highway construction project in California. Undertaken by the Orange County Transportation Authority (OCTA), it is the first design-build project on an operating freeway in the state’s history. By using design-build, OCTA hopes to shave nearly three years from the schedule. The project began in September 2004 and is to be completed in 800 days.
     

Photo Courtesy AGPS Architecture
Portland Aerial Tram

Portland, OR

Under construction
Completion: September 2006

The Portland Aerial Tram will connect the Oregon Health Sciences University Marquam Hill Campus with a new campus and neighborhood under development along the Willamette River in Portland’s central city. The $40-million project is the centerpiece for redevelopment of the South Waterfront. The Portland Office of Transportation predicts about $2 billion in development will be leveraged by the tram investment, resulting in an estimated 10,000 jobs and 5,000 housing units over the next 20 years.
     

Photo Courtesy HDR
Hoover Dam Bypass

Nevada – Arizona

Under construction
Completion: June 2008

The Hoover Dam Bypass is a 3.5-mile corridor between Clark County, NE, and Mohave County, AZ. It will provide an alternate route to reduce traffic problems where U.S. Highway 93 crosses the Hoover Dam. A 2,000-ft-long bridge will cross the Black Canyon and the Colorado River, roughly 840 ft above the river and 260 ft above the Hoover Dam crest. TEA-21 provided $41 million for the $234 million project under the High Priority Projects Program.
     

Photo Courtesy Lone Star Infrastructure
State Highway 130

Austin – San Antonio, TX

Under construction
Completion: 2007

State Highway 130, is a $1.5-billion tollway project within the Austin-San Antonio corridor. The first phase will complete 49 miles of the 90-mile roadway. It is the first Texas highway developed under an exclusive development agreement with a consortia that is responsible for designing, constructing, maintaining and partially financing the turnpike project. Ultimately, SH 130 will be a six-lane roadway with a median capable of accommodating rail.
     

Photo Courtesy Transportation Corridor Agencies
Orange County Transportation Corridor

Southern California
Under construction
Completion: 2010

The $4-billion Orange County Transportation Corridor is a system of toll roads operated by the Transportation Corridor Agencies, who plan, finance, construct, and operate Orange County’s 67-mile toll road system. Fifty-one miles of the system are complete, including the San Joaquin Hills (73) toll road from Newport Beach to San Juan Capistrano and the Foothill/Eastern toll roads (241, 261, 133) from the 91 Freeway to south Orange County.
     

Photo Courtesy Miami-Dade Aviation Department

Miami International Airport

Miami, FL

Under construction
Completion: 2010

Miami International Airport continues a massive $4.8-billion capital improvement program. It involves expansion of the terminals and concourses to add approximately 2.7 million sq ft. Improvements to airside facilities involve runways, taxiways and taxi lanes to optimize land utilization. To support cargo traffic, new cargo buildings will add 3.3 million sq ft of capacity. Improvements to ground transportation systems are also under way. The CIP began in 1993. Substantial completion is slated for 2010, with additional work through 2015.
     

Photo Courtesy James Kinder, INDOT
Ohio River Bridges

Louisville, KY, and
Eastern Clark County, IN

In design
Completion: 2020

Kentucky and Indiana are joining to fund a $2.46-billion effort to rebuild a major portion of the Louisville/Southern Indiana roadway system. The Ohio River Bridges Project includes a new bridge connecting downtown Louisville, KY, and Jeffersonville, IN, an east end bridge completing the I-265 loop, and the rebuilding of the Kennedy Interchange, where I-64, I-65 and I-71 converge in downtown Louisville. Construction is expected to begin in 2007.
     

Photo Courtesy Texas DOT - Dallas District
Dallas High Five Interchange

Dallas, TX

Under construction
Completion: December 2005

The Dallas High Five is a $262-million, five-level interchange that joins U.S. 75 and I-635 in North Dallas. The project began in January 2002. Approximately one-third of the construction has been at night. Construction is 12 months ahead of schedule or 85% complete after 65% of contract time. This should bring the contractor an early completion bonus of about $11 million.
     

Photo Courtesy Metropolitan Washington Airports Authority
Washington Dulles International Airport

Washington, D.C.

Under construction
Completion: 2009

The Metropolitan Washington Airports Authority is undertaking a $3.4-billion capital improvement program, called d2, to expand, replace and upgrade existing aircraft, passenger and support facilities at Washington Dulles International Airport. Improvements include the expansion of Concourse B, a passenger train system (that will largely replace the mobile lounge shuttles), associated train stations and a new security mezzanine in the terminal. Also under way is a new traffic control tower and the first of two new runways.
     

Photo Courtesy HDR
OTIA III State Bridge Delivery Program

State of Oregon

Under construction
Completion: 2011

The Oregon Dept. of Transportation’s Oregon Transportation Investment Act III (OTIA III) program includes $1.3 billion for state bridges, $300 million for city/county bridges, $361 million for city/county pavement maintenance and preservation and $500 million for projects adding transportation capacity. Revenues from increased motor vehicle and trucking fees, as well as federal monies, will finance $2.46 billion in transportation projects. Each year of the OTIA program, construction projects will provide about 5,000 jobs.


 

  Dulles Adds New Runway


Washington Dulles International Airport is aggressively building to accommodate the projected future increase in aircraft traffic. The airport is in the midst of a massive, $3.4-billion capital improvement program, called d2, to improve many facets of the airport infrastructure. One important component in their growth plan is the addition of a fourth runway and associated taxiways, planned for completion in 2008. The $200-million project includes a new 9,400-ft concrete runway, 150-ft-wide with 35-ft-wide asphalt paved shoulders. The project also includes a parallel taxiway, connector taxiways, and cross-field taxiways to tie the new runway to the airport terminal area and the rest of the airfield.

The project design is 60% complete and moving forward on schedule. One tricky component was the re-distribution of all earth removed for construction. Due to budget considerations, there was a strong desire to balance earthwork so that it was not necessary to bring in or remove materials from the site. “It was a challenge to make sure grades were tied to other runways and to maintain balanced earthwork,” says Tony Collier, project manager for Carter & Burgess.

The fourth runway project also includes support facilities, such as a remote deicing pad with nine positions, a deicing operation and control facility, new access roads and biological treatment units to capture and treat storm water. According to Collier, these program elements will be completed by 2009.

 

  Company Profile: Michael Baker Corp.

Transportation infrastructure is in continual flux—the demands constantly driving and overshadowing both the supply and the ability to fully fund projects that would propel aging roads, bridges, and transit systems into long-term, effective service.

The challenge, as transportation engineers, is to prepare for change, while providing the highest value to both customer and community. Over its 65-year history, Baker’s approach to facing challenge and change has evolved by focusing on the complete project life cycle: planning, design, construction services, operations, maintenance, and finally, renewal of the asset.

“The complexity of transportation infrastructure projects requires us to consider all phases of the project, program, or asset.” says Baker’s John Kurgan, senior vice president and national transportation practice director. “The transition between the life cycle phases is where many projects meet the greatest challenges, and where Baker’s experience and talent provide the greatest value.”

Deep understanding of critical issues, such as: context-sensitive design for bridges; NEPA requirements for long, complicated corridors and controversial projects; technology-driven solutions for traffic congestion; alternatives analysis for transit projects; and overall program management of multi-million dollar highway construction. These are but a part of Baker’s complete range of transportation engineering skills.

“We’ve learned, through our design traditions and our corporate culture, to view these challenges as invitations to innovate, and that’s exactly what we do,” adds Kurgan. “The selection of Baker to provide project management, bridge type selection, public involvement services, and final engineering design services for a new bridge over the Ohio River connecting downtown Louisville, KY, and Jeffersonville, IN, is evidence of our willingness and ability to meet the dynamic challenges of transportation infrastructure in this country.”

 

  Toll Road to Ease Congestion in South Texas


The ambitious Texas State Highway 130 (SH 130) toll road will serve as an eastern bypass for the Austin metropolitan area and link the cities of Austin and San Antonio. Traversing urban and rural areas, the northernmost 49 miles, which are currently under construction, will feature 124 bridges and two major water crossings. The toll road will tie in to I-35 at the northernmost point of the alignment and to U.S.183 near Mustang Ridge in the southern portion. Major elements of the facility are its five system interchanges, approximately 30 ramp toll plazas, and four mainline toll plazas. Approximately 36.5 million yards of material will be moved over the length of the project. “To best integrate right-of-way acquisition and utilities relocation with design and construction, the project has been divided into 15 sections,” states Michael Shapiro, P.E., project manager for DMJM Harris, a New York-based AECOM company. DMJM Harris is serving as the project’s lead design firm.

In addition to the complex construction logistics, soil conditions are a key issue. Because of the presence of expansive clays, some sections will require soil undercutting and reconditioning. The average soil reconditioning will be to a depth of 36 in., but some sections may require as much as 72 in. of conditioning.

Another element of the project is the development of aesthetic and landscape treatment guidelines for the entire corridor. The report, Final Aesthetics Design Guidelines, will address the treatment of bridges and walls, landscaping, hike and bike trails and mitigation of the highway’s impact on adjacent historic properties.

The project schedule calls for a 4-1/2-year construction period. SH 130 is expected to open to traffic by December 2007.

 

  Concerns for Port Security Looming

Within the next 15 years, port industry analysts predict a doubling of the approximately two billion tons of cargo that U.S. ports and waterways now handle each year, combined with continued increases in cruise and ferry passenger traffic. In response, seaports across the country are expanding to meet the expected need, which means huge investments in infrastructure, equipment and personnel.

On top of already high costs of meeting America’s trade volume demands, ports are spending millions more to harden security in and around their facilities to protect against acts of terrorism. That is why the nation’s ports are concerned about the Bush administration’s recommendation to eliminate the Dept. of Homeland Security’s Port Security Grant Program and lump it into a sweeping new program that combines the security infrastructure needs of seaports with those of trains, trucks, buses and other public transit.


While it appears Congress will likely reject the administration’s proposal, the American Association of Port Authorities (AAPA) and its member ports argue there is still a need for significantly increased federal funds to pay for port security.

Historically, the Bush administration’s proposed annual budget has only once included the specific security needs of seaports, and that proposal (in FY ‘05) was for only $46 million. This compares to $400 million recommended by AAPA, which reflects estimates that the U.S. Coast Guard made in 2003, showing that America’s ports would need to spend $5.4 billion to protect their facilities over the next decade.

“What the administration’s recommendation would do is to take a grant program that helps fund projects that defend our borders and has clearly-defined costs, and roll it into a nebulous new program that pits border security needs against domestic security programs,” says Kurt Nagle, AAPA’s president and CEO. Nagle added that our economy, our safety and even our national defense depends largely on how well we can protect our seaports and ensure deep-draft shipping access to them.

 

  Viewpoint


Safer Roads Save Lives
By Roger Wentz, Executive Director, American Traffic Safety Services Association (ATSSA)

The 1,800 members of ATSSA are advocating for a number of important congressional issues that are currently under consideration. For example, ATSSA strongly supports efforts to better coordinate roadway safety activities through the creation of a core federal highway safety improvement program. Research obtained by ATSSA indicates that low-cost safety improvements—such as guardrails, crash cushions, pavement markings and improved signage—could have a cost-benefit return as high as $23 for every dollar invested.

ATSSA also supports separate bid activities that would encourage the use of traffic control devices in roadway work zones. Currently, many states lump temporary traffic control components into a single bid package. Logically, contractors then limit the number of devices to reduce costs and increase profits. Separate pay pricing would establish a set price for each device or activity, allowing greater flexibility to ensure a robust safety environment in work zones.

Transit Trends
By Frank T. Martin, Vice President, PBS&J.

With last November’s many transportation-transit initiative victories, projects involving rail and BRT systems, bus service and roadway improvements are all in the spotlight. But, accompanying the boom in voter-approved funding comes the continued pressure of sales tax revenues that support transit operations nationwide. Transit agencies, compelled to streamline operations, will pass that expectation along to engineering firms tackling new transit projects.

Efficient, effective solutions that stretch capital dollars and maximize programs for local areas are needed. Value engineering will be a critical service. More accurate cost estimating also will be required to close the gap between estimated and actual costs, so elected officials do not have to address cost overruns as frequently.

Labor Poor Indicator of Transportation Project Costs
By Ray Poupore, Executive Director,
National Heavy and Highway Alliance


Over the years there have been various pronouncements of the cost savings that would be realized if the Davis-Bacon Act was repealed. These assertions remain unsubstantiated and there is no documentation to support this position.

Little existed to substantiate the proposition that wage rates and construction costs for highways have no direct correlation until the National Heavy and Highway Alliance commissioned an analysis of the costs to build a mile of highway in 1995. Data from the Federal Highway Administration (FHWA) was used to examine the relationship between wages, labor hours and highway construction costs. The conclusion was that hourly wage rates are a poor indicator of cost per mile to build highways. Lower wage states can have high total costs per mile and higher wage states can have lower total costs per mile.

To assure that the conclusions reached in 1995 remain valid, the National Heavy and Highway Alliance contracted with the Construction Labor Research Council to update the earlier study. This study re-confirmed the original findings. When workers’ skills and productivity justify higher wage rates, highways can be built at the same, or even lower cost per mile than when lower wage, lower skilled workers are employed.

While the hourly wage rate for the high wage states was 73% more than the low wage, labor hours were 35% less and total cost per mile was 4% less. Again, not only was hourly wage rate a poor predictor of total highway cost per mile, but there were cost per mile savings associated with construction in the average high wage state.

Higher wage workers can build highways with no impact upon total cost because of their superior skills. This is evidenced by their need to utilize one-third fewer labor hours. Workers benefit from a higher standard of living at no cost to taxpayers.

Another observation from reviewing the data is the small portion of highway cost which is attributable to labor. Only 20% of the total expenditures recorded by the FHWA are labor costs. Efforts to reduce federal highway expenditures are, therefore, likely to be better directed toward other cost categories which account for 80% of highway costs.

The conclusion of the 1995 study remains valid. As the original report stated, “Simplistic views and pronouncements that proclaim lowering the hourly wage rates of construction workers will reduce construction costs and expenditures show a basic misunderstanding of the construction industry. As we have shown in this report, wage rates have a strong correlation with man hours which should prove to anyone’s satisfaction that productivity is the key to calculating labor costs.”

Design-Build Can Be Win-Win
By Frank A. McDonough, P.E., Chairman
of the Board, McDonough Bolyard Peck


Many owners and contractors have experienced the worst of relationships when their construction projects ran into trouble. Cost overruns, schedule delays and unfulfilled quality expectations can lead to disputes that are tough to resolve. It is not surprising that innovative concepts have emerged which can dramatically benefit both parties. Design-build is one such innovation which, when applied in the right conditions, provides benefits in risk management and time savings to an owner and more control to the contractor. While many types and sizes of projects are feasible with D-B, there are important factors necessary for its success. Sometimes, especially with large agencies, it is not possible to expedite decisions. In that case, traditional construction processes may be more effective. The same is true with projects where the final design is already determined. Design-build needs flexibility so the contractor can innovate and bring added value to the project. Design-build is indeed an excellent construction management tool, when wisely used; but the pros and cons should be carefully weighed.

Better-than-Ever Concrete
By Roy H. Reiterman, P.E., Technical
Consultant, Wire Reinforcement Institute


We have better reinforced concrete today than ever before. Why? Because we specify and check the mix design more readily, we have a vast list of admixtures for more enhanced mixes and improved batching facilities and operations. On top of that, we have better placing methods and equipment and improved curing methods. More high-strength concrete is being specified today than ever before. In our welded wire reinforcement (WWR) business, we encourage the use of more high-strength reinforcement (a minimum yield strength of 80 ksi) and more sheet product, especially for flatwork. More WWR is being designed with larger spacings (12 in. or more). Larger spaces require larger wire areas, thus increasing the rigidity which helps to keep the WWR where it will do the most good in slabs and paving. Engineers are now designing and specifying areas or ratios of steel that will refine the design and help keep intermediate cracking tight and level.

Asphalt is a Sustainable Material
By Mike Acott, President,
National Asphalt Pavement Association


Asphalt pavement is the number one recycled material in America, and asphalt pavements are 100% recyclable. This means we recapture, rejuvenate, and reuse the liquid asphalt cement—the most expensive component of the mix. This is particularly cost-effective as the cost of virgin materials increases. In fact, paving with asphalt is like putting money in the bank—it may be worth more when it’s time to recycle than when it was originally laid down.

Some types of asphalt pavement reduce noise pollution and other environmental concerns. On the operations side, the U.S. Environmental Protection Agency has declared that HMA production facilities do not have the potential to be major sources of hazardous air pollutants.
Emissions from HMA plants are very low and well-controlled. Over the past 40 years, while annual production of HMA paving material has increased 250%, total emissions from HMA plants have dropped 97%.

The National Asphalt Pavement Association and the Hot Mix Asphalt industry have an impressive track record on environmental stewardship. Our everyday efforts conserve precious natural resources, minimize the impact of our operations on the environment, and reduce reliance on landfills. Truly, asphalt is a sustainable material.

 

  Paving and Compaction for Today’s Super Roads


Hot mix asphalt (HMA) covers more than 90% of America’s paved roads. That statistic alone served as one impetus for the Strategic Highway Research Program (SHRP) to develop Superpave (SUperior PERforming Asphalt PAVEments). Superpave, first initiated by SHRP in the late 1980s, is a system of performance-related HMA design specifications comprising three elements:

  • An asphalt binder specification geared to pavement loading and local climates;
  • A volumetric mix design and analysis system, incorporating volumetric properties such as the percentage of air voids, voids in the mineral aggregate (VMA) and voids filled with asphalt (VFA); and
  • Soon-to-be-developed mix analysis tests and a performance prediction system that includes computer software, weather database, and environmental and performance models.

Once implemented in California next January, the Superpave specifications will have been adopted by every U.S. state.

Reducing Stress

Today’s standard truck weights increase the wear and tear on asphalt pavement. “This, combined with the dramatic increase in the number of trucks traveling on the highway system, subjects asphalt pavements to stresses that can lead to rutting and premature failure,” says Ron Corun, technical support manager for Citgo Asphalt. CITGO Asphalt uses a technology developed by the Dutch company, Ooms Avenhorn, to produce polymer-modified asphalt (known as CITGOFLEX SP) to meet Superpave binder specifications.

Dave Jones, Ph.D., paving technical manager for Trumbull Asphalt, a division of Owens Corning, agrees. “Interstate highways comprise just 2% of the U.S. lane miles but they carry 75% of America’s truck traffic. It’s not surprising that they get beaten to death.”
Jones says that numbers vary in different studies, but that they show that one truck pass is equal to around 4,000 passes by a car in terms of roadway wear and tear.


Binding Solutions

Of particular significance is the SHRP research on asphalt binders. The Performance Grade (PG) rating system clarifies the asphalt binder specification system and helps tie specifications to performance. While asphalt serves as the glue that holds the roadway together, polymers and other additives reinforce the system to better support high traffic volume, heavy loading and climate conditions.

“There is nothing magical about PG graded asphalt binders,” says Corun. “They simply represent the better quality asphalts we have used in the past, but specified in a new way, and there are new grades available to handle higher temperatures and heavier traffic. PG asphalts give us a new tool to insure our asphalt pavements last longer and perform better.”

The specifications are more restrictive, which has impacted the industry. “Many asphalts that were historically used had to be changed or are no longer around,” says Jones. “They couldn’t accomplish the high and low temperature levels that Superpave requires.” This has impacted production and been an influence on the industry adjustments that have reduced the number of U.S. refineries that make asphalt. There were some 300 refineries 20 years ago, but that number has now dropped below 60.

Making a Difference

Has the research and money poured into the SHRP Superpave program really paid off? “Absolutely,” says Jones. “It has made a difference in the quality of our highways, improved their life, and given the civil engineering community new tools that allow them to design and build better highways. The fact that 49 of 50 states have adopted Superpave is a testament to its value. It has made a significant contribution to the quality of our highways.”

Drum Roll for New Application Option

Inventive machinery is helping to improve the density and compaction when laying roadways. For example, BOMAG recently introduced a re-designed BW 190 AD-4 HF tandem vibratory roller. This new design makes all drum surfaces and sprinkler nozzles visible across the entire 79-in. rolling width, enabling operators to spot potential asphalt pick-up. An optional asphalt manager system automatically measures and controls the compaction performance of the roller, to continuously optimize compaction. Vital information, including the current effective amplitude, asphalt surface temperature and vibration values for compaction increases, is available to the operator at all times. This technology allows the operator to determine the exact number of passes needed to meet density and quality requirements.


  Post-Tensioned Concrete Bridge Relieves Tension for Des Moines Drivers

In June, the City of Des Moines, IA, celebrated the formal opening of an innovative post-tensioned concrete arch bridge that will relieve congestion in the heart of the city’s central business district.

Unlike traditional arch bridges, which use steel tie girders, the Martin Luther King Jr. Parkway Bridge relies on post-tensioned concrete to resist the thrust of the 85-meter, five-lane bridge. The concrete tie girders allowed bridge designers from the Des Moines and Chicago offices of Long Beach, CA-based Earth Tech Inc., to use multiple, independent, steel post-tensioning strands. These strengthened the structure more effectively than would have been possible using steel ties. The Earth Tech engineers also added another unique element to the bridge—twin steel arch ribs that use tension in the hangers to create a stabilization effect, eliminating the need for lateral bracing.

The bridge, which crosses the Raccoon River, is part of a $130-million capital improvement project to alleviate traffic congestion on Interstate 235 and to provide better access to the airport, the central business district, and the state capitol complex.


  Working Out On The North Forty

In farming lingo, the north forty is a landowner’s upper 40 acres on a farm. Denver’s North Forty project involves a variety of activities for 40 miles of Interstate 25, north of Denver. Fourteen miles of the interstate roadway will be rebuilt and widened from four to six lanes. The project area stretches from Broomfield to Fort Collins.

Lawson Construction Co., of Longmont, CO, is currently at work rebuilding 7.5 miles of the highway. They are responsible for final trimming of the grade and all of the concrete paving—from ramps to shoulders to interstate paving.
To accomplish this huge task, they are using an array of GOMACO equipment: a 9500 trimmer, a GT-6300 for shoulder work, an RTP-500 placer, a GP-2500 for ramp work, a GP-3500, two T/C-600 texture/cure machines, and a GP-4000 paver with an In-The-Pan Dowel Bar Inserter (IDBI) for interstate paving.

Lawson’s GP-4000 paves an area that is 40.5-ft wide, while the IDBI inserts 36 bars, 1.5-in. diameter into the 13-in.-thick slab.

“We love to slipform pavement as wide and as long as we can go,” says Ken Lawson, president of Lawson Construction. “We poured 3,140 cu yd in eight hours on our last pour and we couldn’t keep enough concrete in front of the paver.”


  Rustic Pavement Adds to White House Aesthetics

When the U.S. Federal Highway Administration wanted to pave the roadway in front of the most prestigious address in America—using a unique hot mix product—Aggregate Industries’ Mid Atlantic Region proved they were up to the challenge.

The $18-million reconstruction project, in front of the White House, was awarded to Lane Construction and called for the roadway surface to have a unique rustic look. The mix design was originally conceived to resemble a dirt road and consisted of a polymer binder produced by Neville Chemical and brought in from Pittsburgh, PA. This special material was used in lieu of a traditional liquid asphalt binder. The course aggregate used for the mix was brought in from Maine and the pink quartzite sand from South Dakota.

The $1,000,000 paving contract consisted of 2,200 tons of Superpave intermediate course and 1,000 tons of specialty “rustic pavement” surface course. The “rustic pavement” was produced at Aggregate Industries’ Waldorf, MD, plant. Plant manager David Jones and his design, production and quality control team produced the unique product. According to Herb Haller, operations manager for Aggregate Industries, the pavement installation utilized two paving crews working simultaneously. They used an Ingersoll Rand 4410 Blaw-Knox paver and an Ingersoll Rand DD-110 compactor.

The project was coordinated by estimating manager Bob Petty who said, “This is the first high-profile proj-ect using this special mix, and it will hopefully pave the way for similar proj-ects in and around the Washington, D.C., area in the future.”


  New Infrastructure Estimating Software

BID2WIN Software Inc. provides Windows®-based cost estimating and bidding solutions for the construction industry. “We help construction firms win more profitable bids through standardized estimating, increased accuracy and efficiency, and historical bidding analysis,” says BID2WIN President, Paul J. McKeon, Jr.

In June, BID2WIN introduced a browser-based Management Reporting Module for its flagship product, BID2WIN 2005. This optional, add-on module allows users to access and analyze historical bid data from within the office or anywhere Internet access is available. Owners, managers, or estimators can instantly run queries of past bids by date range, estimator, customer, bid status, etc. Then, within these parameters, they can generate reports on equipment usage, material quantities, win/loss ratios, and more. Users can also create subscriptions to have reports automatically e-mailed to them at a specified day and time.


  New Bridge Rising in Modesto

Reconstruction is under way on the 9th Street Bridge over the Tuolumne River in Modesto, CA. Harris & Associates of Concord, CA is providing construction management and resident engineering services. The project required demolition of the existing bridge and construction of a 2,000-ft replacement structure. The new bridge will be a three-frame, cast-in-place, concrete box girder, post-tensioned bridge. It will include parabolic soffits and belvederes. Major project challenges include a tight schedule, environmental concerns, cofferdams, dewatering and placement of underwater concrete. This $22-million project is scheduled to be complete later this summer.


  New Spring-Assist Hatches

East Jordan Iron Works has long been known for the design and manufacture of construction castings. These include manhole frames and covers, catch basins, drainage inlets and trench grates. The firm recently introduced new spring-assist hatches designed for heavy-duty airport applications. Clear openings range from 24 to 36 in. and the hatches may incorporate security bolting, including pentagon or tamper-proof bolts.


  Innovation Block Offers Quick Construction Solution

The Stone Strong® precast retaining wall system uses a series of 5,800-lb blocks, each with a 24-sq-ft face. Three-ft tall and 8-ft wide, the innovative hollow design offers a variety of advantages. First, the hollow cavity means less weight per square foot. “That translates into a much faster, easier, and less costly installation process,” says John Gran, vice president of Stone Strong Systems of Lincoln, NE.

In addition, the design provides a built-in drainage system that alleviates the potential for water damage or drainage system failure. “This innovative block design is the world’s first big block to be fully engineered both structurally and geotechnically,” says Gran. The block does not require tiebacks or additional mechanics and can withstand up to 12 ft of dirt, depending on site and soil conditions. With engineering, a Stone Strong wall can go as high as 40 ft.

The block’s tapered sides accommodate both straight and winding designs—including convex, concave, and circular options. The Stone Strong system accommodates a variety of transportation applications by offering three sizes of blocks, custom patterns and the ability to match any color.


  White Concrete Brightens Bridges

The Pennsylvania Turnpike Commission is currently constructing 100 miles of roadway along the western side of the state. The $3-billion, multi-year expansion includes specification of white concrete, produced with Lehigh white Portland cement, for all mainline bridge parapets.

The advantage of using white concrete is that white reflects more light than traditional gray concrete. This increases visibility at night and in stormy weather. Another advantage is its aesthetic appeal. The white concrete generally provides a contrast to its environment, accentuating the visual aspects of the design.

“White concrete is popular for bridge and highway projects in many states,” comments Larry Rowland, manager of marketing and technical services at Lehigh Cement Co. of Allentown, PA. “The New Jersey Dept. of Transportation has specified white concrete barriers since the early 1960s.” Other state DOTs specifying white concrete include Texas, Pennsylvania, New York and Illinois.

White concrete requires no painting, so there are fewer maintenance requirements. “This alone is a huge asset,” says Rowland. “White concrete keeps traffic flowing and saves lives by being more visible and reducing maintenance crew exposure in high traffic areas.”


  Up to the Challenge

Paving contractor Holmes & Murphy Inc. (H&M) of Orchard Park, NY, recently completed a $12-million runway-taxiway upgrade project at the Buffalo Niagara International Airport (BNI). The mix of choice was not concrete. It was nearly 100,000 tons of asphalt—Federal Aviation Administration (FAA), P-401 mix design—used to upgrade and lengthen the crosswinds runway.

“This is one of the toughest specs to adhere to,” says Curt Resetarits, account representative for Buffalo Crushed Stone Inc., supplier of the asphalt for the project. First, the performance-based spec required minimum densities of 96% across the mat and 92% at the joints. Second, the large, two-inch-minus coarse aggregate used in the base gives the asphalt mix its strength, but has the potential to segregate.

However, the contractor’s unique Terex | Cedarapids Remix paver took care of that. This paver uses two sets of twin counter-rotating augers in the hopper to uniformly pull material from all areas of the hopper to combat material segregation.

Equally as important, the reblending also reduced thermal segregation. At BNI, there was a 40-degree window for each roller to compact the mat to optimum densities. If non-uniform mat temperatures existed, it would have been difficult to achieve spec densities.

Throughout the entire project, H&M outperformed the tough compaction standards of the spec. The contractor attributes much of this success to using the Remix paver.


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