This is the same type of concept used in the “ramp metering” systems, which are used in the D.C. region. Those devices have red and green traffic lights on ramps to highways, and only allow a certain number of cars to enter a freeway at a time.
There will be a VIGOROUS police enforcement of the new system. State Police will be on hand to make sure drivers obey the changing speed limits. Initially, the police will be issuing warnings and after a week those warnings will turn into stiff fines.
The highest the speed limit will go is 50 mph, the lowest it could go is 35 mph. The system also will tell drivers how long they have before they reach a certain point. For example, a driver getting on the Beltway at the Springfield Interchange may be told it will take 15 minutes to reach the Wilson Bridge.
Transportation officials from the Wilson Bridge project are looking for ways to cut down on the number of fender benders and accidents near the bridge. Those incidents ultimately lead to hours of delays. The hope is that the variable speed limit system will reduce the number of collisions by keeping traffic flowing at an even keel.