|FHWA > HfL > Innovator > Issue 40, January/February 2014|
Accelerating Innovation for the American Driving Experience
Pennsylvania Group Demonstrates Value to Taxpayers
Pennsylvania’s State Transportation Innovation Council has several success stories to brag about, including deployment of warm-mix asphalt, geosynthetic reinforced soil integrated bridge systems and the Safety EdgeSM.
But a clear benefit of the group, according to Pennsylvania Transportation Secretary Barry Schoch, is that it shows taxpayers the highway agency and its stakeholders are working aggressively to use tax dollars efficiently and apply new technologies to improve the transportation system. “That in itself is worth the effort of the STIC,” he said.
Schoch told the story of the development of Pennsylvania’s STIC during a fall 2013 virtual conference organized by the Federal Highway Administration to talk about the STIC initiative and announce a new incentive program to help the state-based groups deploy innovations.
STICs—led by the highway agency head and FHWA division administrator in each state—bring together transportation stakeholders to identify and implement innovations, including those promoted through FHWA’s Every Day Counts initiative. All 50 states, the District of Columbia and Puerto Rico have STICS in some format.
STICs are an effective way to build a network to deploy innovation throughout the country, FHWA Administrator Victor Mendez told webinar participants. “Innovation is not the work of just one person, agency or entity alone,” he said. “It is about a partnership of all of us in the industry.”Move to Modern
The Pennsylvania Department of Transportation launched its STIC in 2010 as part of its Next Generation initiative to modernize its processes and technologies. STIC members include representatives from transportation associations, state and local government agencies, environmental and historical preservation groups and academia. The STIC meets quarterly to discuss potential innovations and deployment plans.
Schoch believes it’s critical for him to be at every STIC meeting. “It’s important to show the commitment of leadership on this,” he said. “If you’re not there, that’s sending a message as well.”
In addition to its leadership group, the STIC has 10 technical advisory groups on project delivery, construction, maintenance, design, environment, safety, technology, intelligent transportation systems, materials and public outreach. The advisory groups evaluate innovations and develop white papers on benefits and impacts for STIC leaders to review.
As a result of STIC efforts, about a third of the Pennsylvania DOT’s 2013 paving projects used warm-mix asphalt, which cuts energy use and fuel emissions because it’s produced and placed at lower temperatures than traditional hot-mix asphalt. “That’s a pretty big step up for us in Pennsylvania,” said Schoch, “but clearly there are a lot of benefits.”
The agency built five bridges with GRS-IBS technology in 2013, which reduces costs and construction time, and has at least three planned for 2014. It’s marketing the innovation to local governments with a traveling tabletop GRS model (see “GRS Model Helps Deploy Innovation”). “We want to increase awareness that this technology can be very cost-effective, deliver projects quickly and allow local government to participate with man hours and equipment to help build them,” he said.
The Pennsylvania DOT used the Safety Edge paving technique on 77 projects last year to make it easier for vehicles that drift off the road to return to the driving lane safely.
Making Innovation Mainstream
“We hope that by using innovations such as warm-mix asphalt, GRS bridges and the Safety Edge we can illustrate to the public that these ideas don’t merely go into the bureaucratic black hole of government,” Schoch said.
Instead, the state is putting them into mainstream practice to enhance safety and reduce costs, project delivery time and construction congestion. “The faster we can get innovations into action, the better,” Schoch said, “because it demonstrates that the industry is pushing hard to best use taxpayer dollars and make the transportation system better.”
All told, Pennsylvania’s STIC is implementing 17 of the innovations on FHWA’s Every Day Counts roster, as well as 18 additional innovations the group has identified. “The STIC in Pennsylvania is a good success story, but we’re just getting started,” Schoch said.
One way FHWA is supporting state efforts to deploy innovations is through the STIC Incentive Program announced during the webinar. Under the program, each STIC can obtain up to $100,000 per year to support its innovation efforts under the Every Day Counts initiative.
The funds can be used for activities to make innovations standard practice in a state, such as developing technical guidance and standards, implementing process changes, organizing peer exchanges and delivering training. “They can support some of the things that need to happen to deploy innovation effectively,” said FHWA Executive Director Jeffrey Paniati.
For information on applying for a STIC incentive, contact the FHWA division office in your state at https://fhwaapps.fhwa.dot.gov/foisp/keyFieldFederalAidDivisions.do
Agency Staff Learn From Colleagues at Peer Exchanges
When California Department of Transportation staff wanted to explore programs to certify local agencies to build Federal-Aid Highway Program projects, they got together with their Washington State counterparts to learn how they do it.
During a three-day peer exchange, the California team met with Federal Highway Administration and Washington State DOT experts to discuss the process of administering local agency projects from cradle to grave, with an emphasis on certification programs. They also talked with representatives of local agencies and metropolitan planning organizations about their experiences with Federal-Aid projects. FHWA hosted the event at its Washington Division office in Olympia.
Certification programs are one of the strategies FHWA is recommending in its Every Day Counts effort to help states administer local Federal-Aid projects. Through certification programs, state agencies confirm that local agencies have the ability to manage all or part of the project development and implementation process themselves. They enable states to delegate responsibilities under the Federal-Aid program and allow certified local agencies to manage their own projects, saving time and money.
The FHWA team helping states learn about local agency certification includes Sharon Gordon of the Arizona Division, Megan Hall of the Washington Division and Jorismar Torres-Hernandez of the DelMar Division. One of the tools they’re using is peer exchanges between states interested in setting up certification programs and champion states with experience doing it.
Learning From Champions
The champion states—Missouri, Oregon, South Carolina and Washington—develop materials for the visiting team to review before the exchange, help set an agenda that addresses the visitors’ interests, and make experts in various aspects of local project administration available during the exchange to share their knowledge.
“The participants get to hear from folks who are running a successful state program,” said Hall. “They pick up good practices that they can adopt in their own states.”
Benefits of the peer exchange approach include the opportunity to learn firsthand how states handle certification and project administration issues, Hall said, as well as to participate in in-depth discussions on the topics the visiting team wants to learn about. Exchanges also allow the teams to develop a working relationship that extends beyond the initial meeting.
“After the exchange is finished, the process is not over,” said Hall. “The participants can ask follow-up questions and get additional information. That expert assistance continues to be available to them.”
Steps to Success
Hall, who helped organize the California-Washington peer exchange, recommends several steps for state agencies to follow to assure a successful meeting:
Plan on a peer exchange of at least two days to allow time to cover agenda topics thoroughly, Hall said. Peer exchanges can include video conferencing for some participants to limit travel costs and time, she added.
Since its peer exchange with the Washington State DOT, the California team has been reviewing what it learned about local agency certification and determining next steps. The FHWA team, meanwhile, anticipates helping several other states plan peer exchanges in 2014.
For more information on local agency certification peer exchanges, contact Sharon Gordon at firstname.lastname@example.org To set up a peer exchange, contact your state’s FHWA Division at https://fhwaapps.fhwa.dot.gov/foisp/keyFieldFederalAidDivisions.do To learn more about Every Day Counts strategies for locally administered Federal-Aid projects, visit www.fhwa.dot.gov/everydaycounts/edctwo/2012/local.cfm
A peer exchange brought staff from Washington State’s and California’s highway agencies together to talk about locally administered Federal-Aid projects.
States Expand 3-D Modeling Use
FHWA is offering a series of free webinars to help agencies and other transportation stakeholders adopt 3-D models for construction. The first webinar, “Overview of 3-D Engineered Models for Construction,” was held in November 2013.
The rest are scheduled for the following dates in 2014:
For information on the webinars, contact Douglas Townes at (404) 562-3914 or email@example.com. To learn more about 3-D modeling for construction, go to www.fhwa.dot.gov/everydaycounts/edctwo/2012/3d.cfm
The use of three-dimensional models of highways has taken a firm foothold in modern transportation construction. The technology, part of the Federal Highway Administration’s Every Day Counts initiative to deploy innovation, allows for faster, more accurate and more efficient project planning and construction.
As the benefits are more widely recognized, many in the U.S. highway industry are making the transition to using 3-D mode over the traditional two-dimensional design process.
Fundamentally, 3-D modeling is the use of a collection of intelligent computer objects that represent an original surface, in this case the design surface of a highway segment. The objects know their position in space and in some cases what they represent. With 3-D modeling software, design and construction teams can connect virtually to develop, test and alter project designs throughout the design and construction phases. Design features can be viewed geospatially, or in a 3-D view, from multiple perspectives, and simulations can be run to detect design flaws before construction begins.
Data exported from 3-D models can be transferred to construction equipment, like bulldozers, excavators, pavers and rotomills, with automated machine guidance controls that significantly improve productivity. Equipment operators can compare design grades to their current grade by using a computer display in the cab, an innovation that saves time and rework. Contractors estimate as much as a 15 to 30 percent increase in productivity.
The California Department of Transportation conducted a survey of state highway agency practices with 3-D modeling, available at www.dot.ca.gov/newtech/researchreports/preliminary_investigations/docs/enhanced_constructability_review_preliminary_investigation.pdf. Eighteen state transportation departments responded to the 2012 survey. Nearly three-fourths of the respondents are now using advanced modeling, and most modeling began in the middle to late part of the 2000–2010 decade. Several DOTs have or are now implementing 3-D modeling programs.
According to the survey, Maryland, Washington and Wisconsin are the only states using four-dimensional models that add the dimension of time (construction scheduling) to spatially based 3-D models. In Wisconsin, 4-D modeling is not mandatory, but is at the discretion of project staff. Washington uses 4-D models for visualization purposes only. Washington models may also reflect other project considerations, such as construction staging, emergency design alternatives (such as flooding and earthquakes) and historic narration.
Agencies are using advanced modeling techniques for reconstruction and grading projects as well as intersection improvements, culvert replacements, storm sewer and drainage improvements and bridge replacements. Most respondents reported that contractors are using 3-D models for automated machine guidance.Technology Benefits
Survey respondents cited a range of benefits associated with modeling, although for the most part they were unable to quantify them.
GRS Model Helps Deploy Innovation
A tabletop model is showing Pennsylvania audiences how geosynthetic reinforced soils can improve the way bridges are built.
The geosynthetic reinforced soil integrated bridge system, a Federal Highway Administration Every Day Counts innovation, uses geosynthetic reinforcement and granular soils as a composite material to build abutments and approach embankments that are less likely to settle and create a bump at the end of the bridge. The GRS-IBS is easy to build and maintain and more cost-effective than conventional construction methods.
The Pennsylvania Department of Transportation, FHWA Pennsylvania Division and Pennsylvania State University combined forces to create the GRS model. Its main use is for training sessions on the technology, but it’s also making the rounds of transportation events and conferences throughout the state.
Built with lightweight materials, the model is easy to assemble and disassemble. When taken apart, it’s small enough to fit in a car. The model debuted at the September 2013 meeting of the Pennsylvania State Transportation Innovation Council before heading into a series of training sessions. It was also displayed at the Associated Pennsylvania Constructors Fall Seminar.
Designed and built by Steve Bloser and Eric Nevel at Penn State’s Larson Transportation Institute, the model clearly depicts the simple technology used in the geosynthetic reinforced soil bridge abutments, said Karyn Vandervoort, Every Day Counts coordinator for FHWA’s Pennsylvania Division.
“We are expecting more and more bridges to be constructed using this proven time- and cost-saving approach now that the visual tool is available for audiences across Pennsylvania,” she said.
For more information on GRS-IBS,visit www.fhwa.dot.gov/everydaycounts/technology/grs_ibs/index.cfm
The Pennsylvania DOT is using a traveling tabletop model to demonstrate the benefits of geosynthetic reinforced soils in bridge construction.
State highway agencies are trying innovations that are new to them and making them standard practice to better serve travelers and taxpayers.
More states are adding diverging diamond interchanges to their highway-building toolkits to enhance safety and traffic flow at busy interchanges. The Minnesota Department of Transportation, for example, opened its first DDI on State Highway 15 in St. Cloud to serve a rapidly developing healthcare campus. The Ohio DOT built its first one at Roberts Road and I-270 in Columbus to handle the area’s large traffic volume. The Idaho DOT’s first DDI is designed to improve access to I-86 from Yellowstone Avenue in Chubbuck. And the Kansas DOT’s first DDI at I-35 and Homestead Lane in Johnson County eliminates the wait for left turns onto the interstate and reduces crash potential.
Rhode Island Develops Intelligent Compaction Specification
District of Columbia Opens Design-Build Bridge
Ohio LTAP Makes EDC Local
Tennessee Demonstrates Intelligent Compaction
Innovator to Go Electronic
Innovator — the Federal Highway Administration’s source for innovation news—will move from a print publication to an all-electronic newsletter in 2014.
Readers will be able to view the new Innovator online on their preferred devices as well as download and print a copy. Readers who sign up for the electronic Innovator will receive an email alerting them when the latest issue is available.
Going electronic will allow the newsletter to include enhanced content, such as videos, slide shows, 3-D images and links to more detailed information on innovations. It will also save printing and mailing costs and time, enabling FHWA to get the latest innovation news to subscribers faster while minimizing the environmental impacts of paper publication.
Make sure you don’t miss an issue by signing up for email notifications at https://public.govdelivery.com/accounts/USDOTHFL/subscriber/new?topic_id=USDOTHFL_12&pop=t
Visit Us at TRB
Stop by the Center for Accelerating Innovation display at the Transportation Research Board Annual Meeting—January 12–16, 2014, in Washington, D.C.—to see how the Federal Highway Administration is partnering with transportation stakeholders to build highways better, faster and more safely.
Experts will be on hand to answer questions and offer information on resources to learn more about the innovative technologies and practices FHWA is promoting through the Every Day Counts initiative.
Also make plans to attend the Center for Accelerating Innovation’s “Leadership and Innovation” session from 1:30 to 3:15 p.m. on January 13. Speakers include FHWA Administrator Victor Mendez, Utah Department of Transportation Executive Director Carlos Braceras, Pennsylvania Transportation Secretary Barry Schoch and Nokia Vice President Ogi Redzik. FHWA Executive Director Jeff Paniati will moderate.
A session on “Legacy and Future of Project Demonstration Showcases” is set for 2 to 4:30 p.m. on January 15. It will look at the past, present and future of demonstration projects, which enable transportation professionals to see innovative construction approaches in action. As a result of these showcases, a variety of innovations have moved into standard use nationally.
Speakers include Bruce Seely of Michigan Technological University on the history of demonstration projects, Mary Lou Ralls of Ralls-Newman on how showcases have demonstrated the benefits of accelerated bridge construction, Ewa Flom of FHWA on funding available for showcases and Randy Brown of Applied Research Associates on using game-based learning tools to conduct virtual demonstration projects. Kathleen Bergeron of FHWA will moderate.
For more information on the TRB meeting, visit www.trb.org/AnnualMeeting2014/annualmeeting2014.aspx
Wyoming Opens Its First Diverging Diamond
When the Wyoming Department of Transportation built its first diverging diamond interchange recently, it cut construction time and costs to about half those of the conventional alternative, estimates Mark Boushele of the Federal Highway Administration’s Wyoming Division.
The state reworked the Interstate 25/College Drive interchange near Cheyenne for a cost of $4.16 million. Construction time was just nine months, compared to two construction seasons and 18 months of traffic control that a conventional widening of College Drive would have taken, said Boushele.
The DDI is one of the innovative interchange and intersection designs FHWA is promoting through the Every Day Counts initiative. And the Wyoming DOT received a grant from FHWA’s Highways for LIFE program to try it on the I-25/College Drive project.
The DDI’s innovative features are in the actual design of the interchange. The traffic is switched to drive on the left side of the structure through reverse curves on each end of the interchange. By moving traffic to the left side of the traveled way as it crosses the structure, left turns to the entrance ramps no longer conflict with the opposing through movement. All left turn movements become a “yield” or “free” condition, allowing signals to be reduced to a two-phase system.Less Delay
“The new DDI significantly reduced delay for vehicles entering and exiting the I-25 freeway at this interchange,” Boushele said. “And it should provide capacity needed for a 20-year time horizon. The main problem at the interchange was left-turning truck movements because there are truck stops on three out of four corners of the interchange. And the interchange also has truck traffic from Interstate 80, which runs about a half-mile north of the new interchange.
The conventional alternative to the DDI probably would have been to widen the College Drive bridge and roadway in the area from three lanes to five, Boushele said. That would have required acquiring new right-of-way and would not have addressed the need for truck storage for left turns. But the new DDI eliminates the need to store trucks because they now have free left turns off the bridge, Boushele said.
Standards and specifications for the DDI innovation are available and ready to use, as demonstrated by the departments of transportation in Missouri and Utah, which are constructing or have constructed several DDIs. DDIs are now open or being designed or built in Missouri, Tennessee, Utah and more than a dozen other states.Enhanced Safety
The DDI is expected to improve substantially the safety of the College Drive interchange. A study of Missouri’s first DDI found a dramatic drop in the crash rate—about 40 percent—and a significant reduction in crash severity. Such reductions can be attributed to the smaller number of vehicular conflict points in the DDI compared to conventional interchanges.
Crash data for the College Drive interchange shows that from 2006 to 2010, 38 crashes occurred on College Drive and 34 crashes on I-25 within the study area. On College Drive there were no fatalities, 11 crashes with injuries and 27 property-damage-only crashes. On I-25 there were no fatalities, five crashes with injuries and 29 crashes with property damage only.
Boushele reports that the new interchange is working well. Operation of the interchange was also improved by adjusting the way traffic entered and exited one truck stop. “Wyoming works with landowners to make adjustments too.”
“Wyoming is not designing any new DDIs at the present time, but they are always a consideration,” Boushele said. “We will build more of them, because I think this one is going to be successful.”For more information on intersection and interchange geometrics, visit www.fhwa.dot.gov/everydaycounts/edctwo/2012/geometrics.cfm.
Photo top - Wyoming DOT received a grant from FHWA’s Highways for LIFE program to try it on the I-25/College Drive project.
World of Concrete, January 20–24, 2014, Las Vegas, Nev. Details at www.worldofconcrete.com
National Asphalt Pavement Association Annual Meeting, February 2-5, 2014, Boca Raton, Fla. Visit www.asphaltpavement.org/annualmeeting
Applications of 3-D Models in the Construction Office, Every Day Counts webinar, February 19, 2014. Contact Douglas Townes at firstname.lastname@example.org
American Traffic Safety Services Association Annual Convention and Traffic Expo, February 21–25, 2014, San Antonio, Texas. Register at http://expo.atssa.com/
Institute of Transportation Engineers Technical Conference and Exhibit, March 9–12, 2014, Miami, Fla. Go to www.ite.org/meetings/index.asp
Design-Build in Transportation Conference, March 19–21, 2014, San Jose, Calif. Details at www.dbia.org/Conferences/transportation/Pages/default.aspx
Applications of 3-D Models on the Construction Site, Every Day Counts webinar, April 2, 2014. Contact Douglas Townes at email@example.com
National Conference on Transportation Asset Management, April 28–30, 2014, Miami, Fla. Visit www.cvent.com/events/10th-national-conference-on-transportation-asset-management/event-summary-be4a48a1ff534e04a5eeba464b2878f3.aspx
Symposium on Alternative Intersection and Interchange Design, July 20–23, 2014, Salt Lake City, Utah. Details at https://sites.google.com/site/trbijsub/meetings-events
Innovator, published by the FHWA Center for Accelerating Innovation, advances implementation of innovative technologies and accelerated project delivery methods in the highway industry. Its audience is transportation professionals in highway agencies, trade and research groups, academia and the private sector, and the driving public.
Center for Accelerating Innovation Team
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