This isn’t all stop lights. At many lights the button doesn’t do anything. But at some of them you do have to press the button. What is the purpose of making you press the button?
In: Engineering
Think of it like the turn arrow. If there’s no car in the turn lane the sensor will never be tripped and the arrow will never turn green. The button is the simplest way to let the system know someone wants to cross so the walk sign turns on rather than the don’t walk staying illuminated.
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