Scholarly record
OPTIMIZATION OF SPEED HUMPS IN ORDER TO IMPROVE THE TRAFFIC AND REDUCE POLLUTION
Abstract
The present paper uses microsimulation softs to identify the main problems regarding the speed humps location and proposes some improved solutions, with effects on traffic, pollution and safety. This paper also defines the notion of "speed hump", its main advantages, disadvantages and some implementation requests. The most accessible measures to increase road safety, both in economic and design terms, are the traffic calming measures, such as speed humps in different shapes and sizes, low-price solutions with satisfactory effects. However, they can have negative impact thus it is recommended a prior analysis to determine the necessity of speed humps, the environmental impact by exhaust emissions, noise and vibration. This article uses Cluj-Napoca city from Romania as a case study. Speed humps were installed throughout the city during the last years, some of them creating discomfort in traffic, not always justified by the results. By simulating the traffic on sites, using Vissim as the microsimulation soft, the authors were able to establish the negative effects speed humps may have on the environment and the measures to be taken in order to optimize them. Using the presented software, different scenarios were created both in terms of location and shape of speed humps, considering various traffic flows, resulting the time and average speed necessary for crossing the speed humps. Also, increased emissions are derived depending on the geometry of the hump, due to braking and more aggressive acceleration.
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