TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 1950 contains 10 papers that cover topic such as using decomposition in exposure, accident risk, and fatality risk; negative binomial regression techniques; estimating crash modification factors of signal installation; models of injury count by severity; effects of sample size on goodness-of-fit statistic and confidence intervals of crash prediction models; accident prediction models; using macrolevel collision prediction models in road safety planning; and calibration of safety prediction models for planning transportation networks. The TRR: Journal also includes the draft prototype chapter for rural two-lane highways of the "Highway Safety Manual."
Individual TRR Journals, which are published on an irregular basis throughout the year, consist of collections of peer-reviewed papers on specific transportation subject areas and modes. Abstracts of papers that make up this TRR are available through TRB's Publication Index.
TRR Journals may also be purchased on an annual subscription basis. Each year, TRB publishes approximately 45 volumes of the TRR Journal, containing more than 800 papers grouped by subject.