Simulation model of traffic operations on single carriageway roads
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Date
2018
Authors
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Publisher
Universiti Teknologi Malaysia
Abstract
A traffic model should be developed to evaluate the effect of road layouts and traffic characteristics on traffic operations. This research is conducted to investigate traffic behaviour on single carriageway roads. The effect of various road layout, Heavy Goods Vehicles (HGVs), overtaking provisions and traffic directional split on capacity and speed has been evaluated. This simulation model has the ability to represent traffic operations on single carriageway roads and priority junctions at or near capacity for a varied range of road layouts and traffic characteristics. The model was calibrated and validated by using field data from Johor Bahru and results from previous studies. The model development process includes input data, simulation and output data. The simulation process involves of driver behaviour which consist of car following, overtaking and lane changing. The simulation results suggest that Malaysian single carriageway roads have the capability to carry high flows without causing extensive traffic delays. The road layout and the presence of motorcycle have insignificant effect on maximum flow and journey speed. In contrast, the presence of HGVs proportion in the traffic stream has an influence on the maximum flow. The model also can be used to evaluate the effect of traffic directional split and priority junction on journey speed. The simulation results show a reduction in journey speed as the opposing flow increases. For a road section comprising of priority junctions, the number of junctions per kilometer length of the road has no influence on journey speed. The reduction in journey speed only occurs as the turning flow at the individual junction increases. This proposed a need for further field studies as the single carriageway roads speed/flow/geometry relationships do not include the journey speed being affected by both opposing flow and turning flow. There is also a need for further detailed of traffic operations field studies at or near capacity
Description
Thesis (Ph.D (Civil Engineering))
Keywords
Traffic engineering—Research, Traffic monitoring—Data processing, Traffic flow—Data processing