Research Highlights

Exploring Drivers’ Attitudes and Behaviors toward Bicyclists: The Effect of Explicit and Implicit Attitudes on Self-Reported Safety Behaviors

Tara Goddard
Bicycling in the United States is disproportionately unsafe as a transportation mode. Despite comprising a smaller share roadway users, bicyclists are twelve times more likely to be killed in a traffic crash with a car than car occupants (Pucher and Dijkstra, 2003). Bicyclists involved in a collision with a car are three times as likely to suffer a serious injury (Rivara et al., 1997) and significantly more likely to suffer a traumatic brain injury (Juhra et al., 2012) than bicyclists in non-... Read More

Characteristics of Transitions in Freeway Traffic

Robert Bertini
Soyoung Ahn
This research seeks to understand the characteristics of transitions as freeway traffic changes from one state to another. This study addresses the features of two types of transitions; transitions near a merge and transitions along shock waves during the onsets and dissipations of queues at several freeway sites. Individual vehicle trajectory data were analyzed for studying the transitions near a merge. The length of a transition zone was measured by analyzing the spatial changes in flow, de... Read More