Optimum design of speed hump based on empirical data

Abstract

Traffic calming techniques are extensively used as safety tools to reduce the speed of motorised vehicles along any type of paved road. The objective of this study is to evaluate the efficacy of isolated speed humps on urban roads in India and to suggest an optimised geometry of speed humps for the desired level of speed reduction. For this, five different urban road sections were identified in Delhi and video graphic data were collected at each study section. The median speed of vehicles at each grid is estimated and speed profiles were developed for each category of vehicle approaching the speed hump. The speed behaviour of the vehicles approaching a circular or parabolic shape of isolated speed hump are examined and compared. This study developed speed profile models using regression techniques for an individual vehicle and also for the combined data. The observed speed of the vehicle was considered as a response variable and the physical properties of the speed humps were considered as explanatory variables. Further, the combined linear equation was considered for determining the optimum height and entry radius of the speed hump for the desired speed by using the simplex method.

Impacto de lombadas e travessias elevadas na velocidade de veículos de passeio baseado em dados naturalísticos

“…Purnomo, Handayani and Syafi'i (2018) concluded that the height of the device showed the greatest correlation with speed reductions. Chandra, Begum and Sekhar (2022) observed that for SB with a parabolic design the vehicle speed at the crown of the SB presented great values (13 to 28 km/h) than for those with circular design (5 to 21 km/h). Reduction in crashes was also a well established point regarding SB implementation (Gyaase et al, 2023).…”