This research report presents a snapshot of the trends facing public transportation and tested strategies for counteracting transit ridership decreases. The research method includes a literature review, analysis of current transit ridership levels, and ten case studies.

This research report supports the AASHTO Highway Safety Manual by establishing the methods for ensuring reliable results in crash prediction models.

This research report outlines a procedure for using crash modification factors (CMFs) to understand and quantify the effect of a transportation investment on the system. The report dives into great detail on how to select and adjust CMFs for different pavement and bridge assets, how to apply the CMFs in investment decisions, and how to develop new CMFs that account for important factors relating to the location and asset type.