The STREAMS Motorway Management System improves the utilisation of motorway capacity by providing adaptive on-ramp metering and off-ramp management.

The use of ramp metering to control the rate of entry of vehicles onto a motorway in times of high demand has been shown to improve the performance of the motorway. Performance is improved in the following ways:

When integrated with the traffic signal management system responsible for controlling the intersections at the end of off-ramps, ramp capacity can be maintained at a suitable level. This ensures that queuing does not extend from the ramp onto the motorway, causing a breakdown in flow.