## Traffic LightProbability puzzles require you to weigh all the possibilities and pick the most likely outcome.
There is a traffic light at the top of a hill. Cars can't see the light until they are 200 feet from the light.
The cycle of the traffic light is 30 seconds green, 5 seconds yellow and 20 seconds red. A car is traveling 45 miles per hour up the hill. What is the probability that the light will be yellow when the driver first crests the hill and that if the driver continues through the intersection at her present speed that she will run a red light? ## What Next?
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