This research was initiated to develop new rumble strip configurations for the Pennsylvania Department of Transportation that would alert inattentive or drowsy motorists and could be safely and comfortably traversed by bicyclists. Three primary steps were involved in the development of the new configurations. First, simulation was used to evaluate different configurations for their potential to be bicycle friendly. Second, several configurations that had the greatest potential to be bicycle friendly were installed and field experiments were conducted to further evaluate their effectiveness. Finally, the field data were analyzed and the configurations that were installed were ranked based on their ability to provide a comfortable and controllable ride for bicyclists and to alert inattentive or drowsy motorists. On the basis of results of bicycle and motor vehicle tests, two new rumble strip configurations were recommended for implementation along nonfreeway facilities. One configuration was recommended for use along nonfreeway facilities with higher operating speeds, and a second was recommended for nonfreeway facilities with lower operating speeds.