May 2014

The TRB Planning and Environment Group and Committee on Public Involvement (ADA 60) has released a call for entries for  TRB 8th Annual Competition and Call for Communicating Concepts with John and Jane Q. Public: Freight Transportation Needs and Issues.

The entry submission deadline is Friday, July 25, 2014.

To apply, visit the competition website.

The recycling of construction and demolition waste as the foundation for new roads is a well-established practice in the transportation industry. Two of the most common waste materials are recycled asphalt pavement (RAP) and recycled concrete aggregate (RCA). In addition to reducing waste, greenhouse gas emissions, and energy consumption associated with mining and processing new materials, the use of recycled materials reduces costs by up to 30 percent over fresh aggregate. Although these materials are trusted enough to be used by municipalities—as much as 400,000 tons per year in some locations—specific information regarding their performance in the field is lacking.

The Engineering Properties of Recycled Materials for Unbound Applications (CFIRE 03-04) project, led by CFIRE affiliate researcher Tuncer Edil, aimed to collect and analyze field data at the Minnesota Road Research Facility (MnRoad) using test sections made from RCA and RAP materials. The test results provided exact values to properties already recognized by anecdotal evidence.

This project included a number of tasks:

  • Preliminary research and analysis of previous experiments
  • Surveys on the use and storage of RAP and RCA, as well as private test results
  • Testing the ability of RCA and RAP to sustain repetitive loading
  • Comparing laboratory and field results
  • Testing the effect of freeze-thaw cycles on RCA and RAP
  • Testing the effects of precipitation on RCA and RAP
  • Assessing the impact of the compaction level of RCA and RAP
  • Analyzing force deflection of RAP and RCA
  • Measuring the consistency of RAP and RCA materials
  • Testing the elemental content of liquids leaching through RCA and RAP

This research suggests that in most categories recycled roadway materials like RCA and RAP are equal to, or marginally better than, conventional materials like Class 5 aggregate in unbound applications.

The results of these tests seem to promise a larger future for the use of recycled materials in roadway construction. The research also provides a set of characteristics that new materials, recycled or not, can be measured against to test for suitability in future roadways.

For more information about this project and to read the final report, visit the CFIRE 03-04 project page.

Safety Analysis for the Beginnings and Ends of Trucker Journeys

May 23, 2014

In spite of the overwhelming proportion of truck travel taking place on highways, roughly 76 percent of trucking accidents take place on local roadways and the streets that connect to highways. The traffic safety on streets that link logistical areas like factories and warehouses to highways is therefore particularly critical to truckers. The Developing Safety […]

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New Calculator Predicts Environmental Impacts of Truck Fleets

May 22, 2014

For numerous reasons, including tracking the rise of greenhouse gases and predicting rising demand for fuel, emissions data for heavy duty diesel vehicles (HDDV) like semi trucks is valuable to researchers. Emissions forecasting enables regulatory bodies and trucking companies to thoughtfully plan for the future. Combining multiple sets of data, CFIRE affiliate researcher Dr. Paul […]

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Spring 2014 TMP Reception

May 13, 2014

On Friday, May 10, the Transportation Management and Policy (TMP) colloquium and practicum students presented the results of their group projects to interested staff and faculty, as well as other students. About the TMP Colloquium Students in the Transportation Management and Policy (TMP) program take two one-credit colloquium modules as part of the TMP curriculum. […]

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Schroeckenthaler to Intern at CBO

May 13, 2014

CFIRE project assistant and Transportation Management and Policy (TMP) student Kyle Schroeckenthaler will be interning with the Congressional Budget Office (CBO) in Washington, DC this summer. While at the CBO he will work with a senior economist  to carry out analysis of the United States deep-water ports including the establishment of standard performance measures, investigation […]

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A Tour of CREATE

May 12, 2014

As part of the 2014 MAFC Annual Meeting and NAFTANEXT Conference, participants had the opportunity to tour some of the Chicago Region Environmental and Transportation Efficiency (CREATE) program’s project sites. MAFC researcher Maria Hart attended the tour, took photographs, and then added the photographs to a Chicago map using ArcGIS.

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