Why aren’t signals put on a flash cycle late at night?

Broomfield does not put signals in flash overnight in order to maintain a more typical condition for vehicles at the intersection over the entire day. One of the main goals is consistency in traffic signals and this helps us achieve this. Overnight signal timing is changed so that they are no longer in coordination to assist drivers in getting a green as soon as possible.

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1. Why do traffic lights take so long to change?
2. Why does a signal change when no vehicles are present?
3. Why aren’t signals put on a flash cycle late at night?
4. When traveling on some streets, red lights are hit on a regular basis? Can't they be coordinated?
5. Why isn't there enough green time at a signal to get the traffic through at some approaches?
6. Who takes care of state highways and traffic lights?