Pedestrian behavior at unmarked roadway needs to be addressed for their current serious safety issue. This paper modeled pedestrian roadway crossing as decision-making processes in risky situations where they choose speed to minimize discomfort. Discomfort was represented by their perceived risk and deviation from their expected crossing time. The predicted walking speed, which is the most important variable during crossing, was consistent with observed field data. Possible application in road design and limitation of the model was discussed.
