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The objective of this research was to quantify the impacts of various factors on three different severity levels of pedestrian injuries sustained in crashes reported at highway-rail grade crossings. This research utilized the 2007-2010 crash and crossing inventory data. The three crash severity levels of pedestrians’ injuries were: no injury, injury, and fatality.Data analysis showed that pedestrian fatalities were associated with higher train speeds and with female pedestrians. Highway-rail grade crossings with a greater number of crossing lanes and those equipped with standard flashing light signals were associated with a lower likelihood of pedestrian fatalities.

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A park-and-ride (P&R) is a parking facility with connections to public transit service. The ITE Trip Generation Manual, ninth edition, presented trip generation rates separately for P&R facilities with bus and light rail service; however, the small sample sizes (maximum sample size was six studies) and outdated trip generation rates (between the 1980s and the 2000s) may not be an accurate representation for transportation engineers and planners to estimate the traffic impacts of P&R facilities correctly. This paper describes a comprehensive trip generation study that was performed at 40 regional transportation district P&R facilities in the Denver, Colorado, region with regional bus and light rail transit service. Similar to the ITE manual, this study estimated and produced weighted-average trip rates and regression equations. The sample size and variation in the data collected in this study can be used as a good representation for computing trip generation locally or for being applied to cities with similar transit systems and P&R design criteria.

A case study to assess the survivability of a large-scale urban intelligent transportation system (ITS) network is presented. The ITS for Boise, Idaho, was analyzed on the basis of two survivability assessment techniques, which are discussed and summarized. The first approach provides a qualitative assessment of the Boise ITS; it is based on the survivable systems analysis method as modified for critical infrastructure. The second approach provides a quantitative assessment of network survivability by using a multilayer graph-based approach consisting of the greater Boise area power grid and surface transportation system. The power grid and the physical and control transportation graphs were analyzed to determine the relative criticality of various network components. Macroscopic modeling was used to investigate the effect of components' failure on the network's operational characteristics. The greater Boise area has a population of more than half a million. The analysis presented here serves as a case study showing the means of assessing the importance of various components in critical infrastructure layers. The results have enabled traffic operators and decision makers in the Boise area to understand the effects of failure events and to prioritize threat mitigation alternatives.