Effects and measures in the HVS-network with ramp metering (VSS2003/302)
Overview
Background & policy context:
The effects of motorway ramp metering on the secondary road network are examined. Alternative ramp metering strategies are evaluated for different network typologies with respect to different criteria (traffic safety, network fluidity on the motorway and the secondary network, equity). A method for checking the suitability of different metering strategies and other traffic measures for alternative network typologies is needed to developed and tested for practical cases with the help of microsimulation.
Objectives:
The goal of the project is it to develop a method for the evaluation of alternative ramp metering strategies and to determine the most appropriate measures to reach the best overall benefits (in terms of traffic safety, traffic flow throughput and equity) on the whole network. The most frequent network typologies, traffic conditions and ramp metering strategies will be set into a relation and possible effects will be examined.
The result should allow:
- to pre-determine the local effects of ramp metering
- to check the compatibility of motorway ramp metering on the secondary network and to determine possible limits
- to develop the optimal motorway metering strategies and the applications spectrum for measures on the secondary network.
Methodology:
The activities provided during the project are listed below:
- To study of literature and internet search on spplications of ramp metering with special attention to the impact on the subordinate road network.
- To provide list of different management strategies (eg priority traffic flow HLS, Preventing backflow to HLS driveway etc.)
- To provide an accident analysis and analysis of traffic figures (velocity, density of traffic) on the parent and child network in areas with and without ramp metering.
- To work out the analysis of the degree of concern for various driving categories, analyzing the differences and develop a degree of diameter for distributive justice ("Equity").
- To prepare transport technical analysis of the types of networks, development of action plans
- To provide analysis of practical applications and micro simulation to test the impact of proposed management strategies and traffic engineering measures.
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