Ultra-high performance concrete (UHPC) has mechanical and durability properties that far exceed those of conventional concrete. However, using UHPC in conventional concrete applications has been cost prohibitive, with commercially available/proprietary mixes costing approximately 30 times more than conventional concrete. Previous WTI research resulted in nonproprietary UHPC mixes made with materials readily available in Montana. These mixes are significantly less expensive than commercially available UHPC mixes, thus opening the door for their use in construction projects in the state. The Montana Department of Transportation (MDT) Bridge Bureau is interested in using UHPC in field-cast joints between precast concrete deck panels. The use of UHPC in this application will reduce development lengths, and subsequently reduce the requisite spacing between the decks and improve the overall performance of the bridge. Through this project, P.I. Michael Berry will build on the non-proprietary Phase I UHPC research he recently completed for MDT and focus on ensuring the successful application of this material in these field-cast joints.
If these mixes are viable for this application, Montana could take advantage of the cost savings of the non-proprietary mixes and ultimately improve the performance and durability of bridges. More information on this Phase II project is available here.
Geosynthetic materials are routinely used in transportation applications to facilitate construction, improve stability, and enhance longevity. Departments of transportation have generally had good experience with these products, although a robust and non-proprietary design process for geosynthetic reinforced paved roads is still lacking. The Montana Department of Transportation (MDT) believes that geosynthetics can be used responsibly to provide cost-savings on a number of upcoming highway construction projects in the state, based on their in-house experience as well as previous research and evaluation by WTI. MDT desires experimental evidence of performance for these typical projects in order to proceed with future designs.
Principal Investigator Steve Perkins is leading a new study to conduct full-scale indoor testing of reinforced pavement test sections using a traffic simulator to provide performance data and to evaluate a spreadsheet-based design tool that can be used to augment current design procedures. The results from this study can be directly implemented into future MDT highway construction designs having similar conditions to the test sections. These recommendations will pertain most directly to operational conditions where a stable construction platform is established over relatively weak subgrade when it is advantageous to reduce base course thickness in order to save both time and money.
To follow this project, visit its webpage on the WTI website.
A challenge that many state DOTs face is the accurate assessment of winter maintenance operations. One tool that has been successfully used by DOTs is the severe weather index (SWI), which can assess the performance and related costs associated with winter maintenance operations. It considers the relative severity of each weather event, and relative severity of weather for that season.
Principal Investigator Laura Fay is leading a new project to develop a severe weather index for Maryland DOT by region, Maintenance Shop, and winter storm event. Maryland DOT can use the SWI to determine if costs incurred during each event and winter are reasonable, as well as if the resources deployed and contracted amounts are also within reason.
To follow this project, visit its webpage on the WTI website.
WTI will provide technical assistance to three rural communities and regions to identify and evaluate expanding transportation options, thanks to a new partnership with the National Association of Development Organizations (NADO)’s Research Foundation and the U.S. Department of Agriculture (USDA). USDA sponsors technical assistance grants to rural communities and regions for transportation development, and NADO’s Research Foundation, working in conjunction with WTI, was selected to receive roughly $500,000 in grants. WTI will receive approximately $330,000 to conduct technical assistance for three locations:
- Lebanon, Missouri is interested in developing a public transportation system. WTI will develop a feasibility study that will outline how to plan, develop, and implement a public transportation system within the City of Lebanon (more project information here).
- In communities served by the Deep East Texas Council of Governments (DETCOG), WTI will work with DETCOG to pilot a traveler cheque system intended to provide more mobility opportunities to veterans, persons with disabilities, and older persons. This project is unique in that not only will work and medical needs be addressed, but the system allows users to utilize trips for livability purposes providing they stay within their allotted mileage. The project will include planning, marketing, and public outreach (more project information here).
- In Southwest Colorado, WTI will assist the Southwest Colorado Council of Governments with the development of a fixed route system between Cortez and Durango. The project will include the identification of funding options and development of a sustainability plan (more project information here).
David Kack will head the Southwest Colorado project, and Natalie Villwock-Witte will lead the Lebanon, Missouri and DETCOG projects with the assistance of Karalyn Clouser and Laura Fay, respectively. “WTI has conducted numerous mobility and public transportation studies,” said Kack; “and we’re excited to be working with NADO’s Research Foundation to use our expertise to assist rural communities throughout the country.”
After a highly competitive selection process, the U.S. Department of Transportion has announced that WTI has been selected as a Tier 1 University Transportation Center. The Small Urban, Rural and Tribal Center on Mobility (SURTCOM) will receive approximately $1.5 million a year for up to five years to lead research that improves the mobility of people and goods in small urban, rural and tribal areas. Projects will address issues such as enhancing access to public transportation services, implementing innovative multi-modal solutions, exploring alternative transportion such as ridesharing, adapting “smart cities” innovations to small communities, and increasing active transportation modes such as walking and cycling. WTI will lead the center in partnership with the Upper Great Plains Transportation Institute at North Dakota State University and the Northwest Tribal Technical Assistance Program at Eastern Washington University. Last week, U.S. Senator Steve Daines released a statement congratulating WTI on the the grant award.
Planet Jackson Hole (planetjh.com) has posted a feature article about the wildlife crossing plan that WTI will develop for Teton County, Wyoming. In the article, Jon Mobeck, executive director of the Wildlife Foundation, highlights WTI’s previous work in the area and states that “WTI offers the perfect partnership for Jackson Hole.” The full article is available at http://planetjh.com/2016/10/11/the-buzz-2-wildlife-get-a-brake/
The Jackson Hole News and Guide reports that Teton County Board of Commissioners has selected WTI to complete a wildlife crossing master plan for Teton County’s roads and highways. “County moves on wildlife crossing plan” notes that WTI’s extensive working knowledge of the area and road network led to the selection. For the full story, visit http://www.jhnewsandguide.com/jackson_hole_daily/local/county-moves-on-wildlife-crossing-plan/article_3c48f2fc-1f99-5048-90db-582aa712c8c2.html
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WTI and the Moscow State University for Transport Engineering (MIIT) in Russia received Contract Funding from the Eurasia Foundation’s University Partnership Program for collaborative activities aimed at establishing resource sharing mechanisms and a joint course. Shared resources and coursework will focus on enhancing mobility and equitable access to transportation services for persons with disabilities. (Susan Gallagher and David Kack)