Description: The number of electrical curriculum design: the design of a traffic light ⑴ crossroads traffic lights control circuit requires a two-lane carriageway and B crossover vehicles on the road to the turn to run, a lane (trunk) release of 45 seconds, B Lane (trunk branch) passage time for 25 seconds ⑵ at every red light from green into the middle of the conversion process, it is necessary to light five seconds over the yellow light as to enable the exercise of the vehicles have time to stop to prohibit outside line
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