TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Research Results Digest 8: A Status Report describes the progress and status of the Commercial Truck and Bus Safety Synthesis Program (CTBSSP). CTBSSP is a cooperative research program sponsored by the Federal Motor Carrier Safety Administration (FMCSA) and administered by the Transportation Research Board. The program was authorized in late 2001 and began in 2002 in support of the FMCSA's safety research programs.
TRB's National Cooperative Highway Research Program (NCHRP) Report 674: Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities explores information related to establishing safe crossings at roundabouts and channelized turn lanes for pedestrians with vision disabilities.
Appendices B through N to NCHRP Report 674 were published as NCHRP Web-Only Document 160. The Appendices included in NCHRP Web-Only Document 160 are as follows:
â€¢ Appendix B: Long Lis
TRB's National Cooperative Highway Research Program (NCHRP) Report 671: Review of Canadian Experience with the Regulation of Large Commercial Motor Vehicles examines the process used in Canada to harmonize heavy truck size and weight regulations across the country. The report provides insights on how lessons learned from the Canadian experience might be applied in the United States.
TRB's National Cooperative Highway Research Program (NCHRP) Report 667: Model Curriculum for Highway Safety Core Competencies presents course materials, including the instructor's guide and student workbook, for a fundamental highway safety training course. The course is designed to address the core competencies highway safety practitioners should have or acquire. An accompanying CD-ROM includes a brochure and short Microsoft PowerPoint presentation for marketing the training course.
The CD-ROM is also available for download from TRB's website as an ISO image. Links to the ISO image
TRB's National Cooperative Highway Research Program (NCHRP) Report 665: Identification of Vehicular Impact Conditions Associated with Serious Ran-off-Road Crashes quantifies the characteristics of ran-off-road crashes and identifies appropriate impact conditions for use in full-scale crash testing.
Appendices A through F of NCHRP Report 665, which are as follows, are available online:
Appendix A: Annotated Bibliography
Appendix B: 1997â€"2001 NASS CDS Cases
TRB's National Cooperative Highway Research Program (NCHRP) Research Results Digest 346: Optical Sizing and Roundness Determination of Glass Beads Used in Traffic Markings summarizes the results of a project that examined the precision and bias of both optical and traditional mechanical methods for different glass bead types. The project also compared the precision and bias of various measurement methods, and explored development of a practice for the use of computerized optical methods and equipment to measure the size and roundness of glass beads used in traffic markings.
TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 18: Older Commercial Drivers: Do They Pose a Safety Risk? explores age-related changes in the basic functional abilities needed to drive safely. The report is designed to help assist industry and labor practitioners in promoting safer commercial operations.
TRB's National Cooperative Highway Research Program (NCHRP) Research Results Digest 349: Evaluation of Existing Roadside Safety Hardware Using Manual for Assessing Safety Hardware (MASH) Criteria explores the safety performance of widely used non-proprietary roadside safety features by using MASH. Examples of features evaluated include longitudinal barriers (excluding bridge railings), terminals and crash cushions, transitions, and breakaway supports.
The complete report on the project that developed NCHRP RRD 349 was published as [more]
TRB's National Cooperative Highway Research Program (NCHRP) Report 600C, Human Factors Guidelines for Road Systems, Collection C--including Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated)--explores human factors principles and findings for consideration by highway designers and traffic engineers. The report is designed to help the nonexpert in human factors to consider more effectively the roadway user's capabilities and limitations in the design and operation of highway facilities. [more]
TRB's National Cooperative Highway Research Program (NCHRP) Report 656: Criteria for Restoration of Longitudinal Barriers explores the identification of levels of damage and deterioration to longitudinal barriers that require repairs to restore operational performance.