How to create jobs and fix traffic problems

Computerized traffic control gets better every year. My parents remember when inductive sensors under the pavement were new. I've seen computer-vision assisted traffic control devices. Eventually cars will have transponders in them, and later humans will stop driving. However, until that happens, traffic still sucks, and there are so many small changes that could make it better. I'm going to present here two ideas, one practical, immediately possible to implement with minimal effort, but unappealing to some people, and the other rather less realistic but nonetheless at least as effective.

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