Why doesn’t signal progression work as well on two-way streets?

On two-way streets, coordination is much more complex. Three variables must be taken into account:

  • The distance between traffic signals
  • The cycle length
  • The speed of travel

Nonstop traffic flow can only be provided where exact relationships exist between these three variables.

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1. How does this help drivers?
2. If the signals are coordinated, why do I still get stopped at red lights?
3. Is the traffic signal system timed?
4. Why doesn’t signal progression work as well on two-way streets?
5. Why can’t all signals be timed to avoid any stops?
6. Why do I have to stop? Why are signals so poorly synchronized?
7. Why do I have to wait so long after I stop at a specific signal?
8. Why isn’t there enough time to get the traffic through the signal?