Use Round-Abouts!
Used all over the world, these simple concrete islands are popular for a reason: they work! They keep traffic moving, preventing traffic jams and idling. They slow traffic to prevent fender-benders at "intersections", and are much more visible than stop signs. Plus there is very little construction and maintenance cost compared to traffic lights. They can be used on 2, 4 or more lanes of traffic, there's nothing the round-about can't do!
Plus they're charming. You can plant the middle with natives to make it look beautiful too.
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Colleen M commented
so true.
such a simple solution to keep traffic flowing
let's do more of these