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Why don't they make the red light stay red until the truck goes away if they already have the sensors for it ?

• LeifCarrotson 6y ago
  Because if the truck is behind a car it can't go away until the car goes under the bridge.
• genocidicbunny 6y ago
  Presumably the truck is already at the intersection, so it's unlikely it can actually move out of the way before the light turns green. In the first video, the truck was 3 cars back. That means that it more than likely had no room to turn away until the cars in front of it went. Seems to me that's the idea behind the setup. You put on a long red light -- long enough that hopefully the truck driver would notice the lit up sign and realize that he need to do whatever he can to make a turn when possible. Trouble is that for some people the light would have to be 10+ minutes long before they would notice that it's still red.