Ramp Metering in Stockholm, Sweden
Trafikverket (The Swedish Transport Agency) wanted to understand whether ramp metering, at three separate locations on the E4 near Stockholm, could improve the operation of their highway network.
Microsimulation was the ideal tool for the task so their consultants, Sweco, developed a large Paramics Microsimulation model of the Solna area, and tested the new schemes.
ITS (Intelligent Transport System) for regulating traffic was connected to the model and the ramp metering algorithm was based on speed, flow and the capacity on the highway downstream.
A large model was created to take account of the potential changes in route choice which might result from the scheme.