> guarantee increased car idling I don't think your intuition is correct. Traffic lights let civil engineers tune priority and allow greater throughput at an i

> guarantee increased car idling I don't think your intuition is correct. Traffic lights let civil engineers tune priority and allow greater throughput at an intersection. Just like how we consume large amounts of space for interchanges on interstates instead of using traffic lights, there's a reason we don't see stop signs (at least, not often) on 45+mph roads.