Please use this identifier to cite or link to this item: https://rda.sliit.lk/handle/123456789/3369
Title: Evaluating the Effectiveness of Speed Humps Related to Speed Profile and Noise Profile
Authors: Gamlath, K.G.D
Amarasingha, N
Wickramasinghe, V
Keywords: Level of Service
Speed hump profile
Speed hump
VISSIM
Evaluating
Speed Humps Related
Speed Profile
Noise Profile
Issue Date: 2-Mar-2023
Publisher: SLIIT Faculty of Engineering
Series/Report no.: Journal of Advances in Engineering and Technology;Volume 01, Issue 02
Abstract: Speed humps are an effective traffic calming measure to improve the safety of road users. On the other hand, speed humps have certain drawbacks, such as increasing emergency response time, causing damage to cars, and high noise levels due to excessive traffic. These impacts further vary with different hump profiles. Thus, the primary objective of this research is to investigate how the geometric profile of speed humps affects vehicle speed and noise level. The secondary objective is to find the Level of Service in the presence and absence of a speed hump by using VISSIM microsimulation. In this study, Lake Drive Road, Nawala, was selected with four different speed hump profiles. The Sound Meter smartphone application was used for noise monitoring. A drone camera footage was utilized to capture vehicle flows while speed trajectories of each vehicle were developed using tracking software. The developed speed profiles were used for the simulation purpose. Then, a Multiple Linear Regression (MLR) model was developed and validated to predict the hump height for the desired speed reduction and desired noise level for each selected four-vehicle category. Further, the average noise levels were found to be higher than the Central Environmental Authority's permissible noise level, and it increases with the height of the hump. It was also observed that as the height of the hump increases, vehicle speed decreases. The largest speed reduction, 42.13 %, was observed in passenger cars, while the lowest speed reduction, 23.5 %, was observed in motorcycles. Therefore, speed analysis findings reveal that passenger cars have a significant speed reduction when compared to other categories. However, the average speed reduction for all vehicles was identified as 33.85 %, and VISSIM simulations revealed that the average Level of Service (LOS) drops to LOS C from LOS A due to the presence of the speed hump.
URI: https://rda.sliit.lk/handle/123456789/3369
ISSN: 2950-7138
Appears in Collections:Journal of Advances in Engineering and Technology Volume 01, Issue 02

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