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Related to and based on the ATSC4 Traffic Signal Controller, is ATC's Ramp Metering system that controllers 1 or 2 sets of signals on a ramp joining a high speed motoroway.
The Ramp Metering Controller allows 1 signal green per lane at a time to minimise delays on the motoroway due to the joining vehicles being slower than the motorway vehicles.
The Ramp Metering controller release cars onto the motorway on the basis of the volume of traffic reaching the on-ramp, this avoids the inevitable "slowing" of motorway traffic that has a "wave" effect back on the motoroway.
The Ramp Metering controller must be connected to a SCATS® Adaptive coordination system that also informs the Ramp Metering controller of "when" it is best to "release" vehicles onto the motorway.
By controlling how many and when vehicle joining the motorway, the flow of motorway traffic slowing down is minimised.
The algorithms and set up of the ATSC4 Traffic Signal Controller as well as the setup within SCATS® must be well coordinated for the algorithms that "measure" the release of traffic onto a motorway are very different to those needed for coordination. Improper implementation of RAMP METERING may solve one issue of how best to "release" traffic onto a motorway but may cause a "bank-up" of traffic on the arterial roads that feed to ON-RAMP to the motorway.
ATC can provide specialist design and implementation consultancy on deploying these systems especially where motorways are adjacent to heavily built up arterial roads in urban areas.
For more information on implementing a Ramp Metering solution please contact ATC's Marketing Manager on +61 2 8846 5500 or submit a Webrequest for Information on ATSC4 Ramp Metering by email.