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Cars and Transportation
Reply to "When did they add traffic signals to 270 entrance lanes?"
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[quote=Anonymous]Yes, I saw them north of Germantown this past weekend. The lights are not operational and are covered right now with burlap. They've had these in California for 25+ years. During rush hour, they will control how many cars enter the freeway. In California, it's one car per light. The light completes a green-red cycle every 15-20 seconds. With two lanes on the on-ramp, that means during rush hour you have 6 to 8 vehicles entering the freeway from the on-ramp every minute. Cars wait in line to enter the freeway on the on-ramp. It's all about managing traffic flow in the goal of preventing or lessening back-ups. Too many cars entering the freeway at once = slow down and congestion around on-ramps. [/quote]
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