Brake lights are a good idea. They stop accidents from happening. What if brake lights were made so that they burn steady red if moderate braking but if the person really steps on the break, for one reason or another then the lights would flash at 10-15Hz.
The additional strain on visual sense is minimal and I put my bets on that this would decrease bumper-benders and even serious serial collisions and cost practically nothing to implement if the legislators just picked up on this.
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