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Impact of Curbside Parking on Travel Time and Space Mean Speed of Nonmotorized Vehicles

Curbside parking is an important component of a parking system. This type of parking can significantly affect traffic performance because of both the required roadway resources and the operational characteristics of parking maneuvers. To analyze the traffic performance of nonmotorized vehicles influenced by curbside parking, this study gives a quantitative analysis of the influence of curbside parking on travel time and space mean speed. The travel time and travel speed data of nonmotorized vehicles moving in road sections with curbside parking and barriers between motorized and nonmotorized vehicles were gathered by observers. A proportional hazard-based duration model is proposed to analyze the influential factors related to curbside parking, including the effective width of a bicycle lane; inbound and outbound parking maneuvers, double parking, and load–unload activities; and the time influence rate. Results show that curbside parking has a significant impact on the travel speed of nonmotorized vehicles. Results also indicate that the effective lane width shows a positive effect on travel speed, while inbound and outbound parking maneuvers and the time influence rate show a negative effect on travel speed. In addition, various factors can modify travel speed; the model can be used to estimate travel speed under assumed conditions. It is hoped that this study will help to improve the planning and management of curbside parking.