Abstract
Incidents on roads are an important factor in traffic flow disruption and a consequent loss of time for drivers. Disruptions can be the result of unexpected road incidents or planned repair works after an incident. These situations differ in the availability of information about the incidents and the resulting rerouting undertaken by drivers. The first part of the paper presents a literature review on the impact of road incidents on traffic and driver’s loss of time modelling. Statistical analysis of the database of road incidents on motorways and express roads in the region of Pomorskie was conducted. The average time of arrival of emergency services to a scene and the average time of the rescue action were determined. Simulation research on road incidents was performed for different scenarios with modifications of traffic volume, duration of the road incidents and the degree of road section capacity limitations in various options. The simulation was performed by PTV VISUM software, with the DUE (Dynamic User Equilibrium) module for dynamic traffic modelling. The result of the research is the estimation of the average loss of time for the different variants of the incident, which enabled building a model of the driver’s loss of time for specified event parameters.
Highlights
On their daily commute, road users choose their means of transport, the route and the time so that the journey is the most efficient in terms of duration, convenience and expense
To create a model of time loss caused by traffic incidents the analysis was performed for a section of the highway, with the parameters adopted as in the model for the Metropolitan Area of Gdansk, Gdynia and Sopot in which link capacities and section resistance function are based on measurements performed by University of Technology employees
It was found that it is possible to map the phenomenon of road users' time loss caused by a traffic incident, using a mathematical model
Summary
Road users choose their means of transport, the route and the time so that the journey is the most efficient in terms of duration, convenience and expense. With time drivers use the best route variant, which results in the traffic reaching equilibrium meaning that no other decision would result in a lower cost for drivers’ journey [1]. Changes in traffic conditions occur frequently, caused by planned events such as holidays or mass events. The relevant information can be distributed by different methods so that drivers have a chance to change the route, means of transport or decide not to go. In the event of an unexpected incident such as an accident or collision it is impossible for drivers to change the route before setting off. Such events are unexpected and impossible to plan for [2]
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