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Treebeard's Stumper
17 Oct 97

Traffic Lights on the Pass

I drive Highway 154 to and from my home on San Marcos Pass everyday, so I've had lots of time to contemplate the stoplights that control traffic across the single lane on Cold Springs Bridge during the $%!&# construction. The light is almost always red when I get to it, so it's definitely not red and green for equal times. Morning traffic is much heavier going towards Santa Barbara than towards school, and the reverse in the evening, so it's not programmed in any simple way. So what is the method or algorithm used to control the signals?


last modified .

Marc Kummel /