Research Reports
Filter by Keyword
This research investigates moisture susceptibility of asphalt mixes; evaluates the effect of various numbers of freeze-thaw cycles on the mechanical properties of asphalt and determines if the Georgia Loaded Wheel Tester can be used to test for moisture induced damage.
Fluctuation in temperatures significantly affects pavement stability and the selection of asphalt grading to be used in pavements. Ability to accurately predict the asphalt pavement temperature at different depths and horizontal locations based on ambient air temperatures will greatly help pavement engineers...
This study provides a theoretical evaluation of Transit Signal Priority (TSP) strategies in small-medium size areas to alleviate missed connections, enhance service, and attract more transit riders. Several scenarios are evaluated, involving two TSP strategies; existing and reduced bus headways; and...
This research examines a range of incident detection technologies to determine a recommended combination of approaches for use in the Utah Department of Transportation (UDOT) Advanced Traffic Management System (ATMS). The technologies that were examined are computer-based Automatic Incident Detection...
This report contains a brief description of Intelligent Transportation Systems (ITS) and ITS technologies for Commercial Vehicle Operations (ITS/CVO). Second, it discusses previous literature regarding benefits of ITS/CVO for motor carriers, as well as managing the change due to technology. In addition...
Six major railroads provided the Transportation Technology Center Inc. (TTCI) with defective rail that had been removed from service. The rail, which contained a variety of defects, was placed into a gauntlet track at the Transportation Technology Center (TTC). This paper is the assessment of those six...
This report examines the feasibility of using the thermal stress restrained specimen test to evaluate low temperature cracking in asphalt pavement mixes. Data were collected from laboratory and field evaluations. Various mixing, aging, and compaction methods were used to prepare test samples with materials...
This project evaluated the opinions of commercial vehicle drivers and safety inspectors regarding the roadside inspection process and motor carrier safety. Surveys were developed in cooperation with the Office of Motor Carriers and used to question a representative sample from each of the groups nationwide....
This report is a summary of the impressions, as well as the recommendations, drawn by Gene Griffin, director of the Upper Great Plains Transportation Institute, NDSU; and Dennis McLeod, president, Red River Valley & Western Railroad. These impressions and recommendations are based on an eight-day site...
The Motor Carrier Safety Assistance Program (MCSAP) provides funds for states to conduct various safety activities including roadside inspections of commercial vehicles and compliance reviews of motor carriers. In addition, the Secretary of Transportation has been directed by the Intermodal Surface Transportation...