Rationale: Areas near parks may present active travelers with higher risks than in other areas due to the confluence of more pedestrians and bicyclists, younger travelers, and the potential for increased numbers of motor vehicles. These risks may be amplified in low-income and minority...

This dissertation examines how people understood the phenomenon of traffic congestion in Boston in the 1890's and 1920's, tracking the evolution of their ideas between two periods. Then, as today, public discussions of policies to relieve congestion were based upon ideas about such issues as...