Abstract
Has analyzed the modern municipal transportation control and the management
question present situation, unified the city and countryside transportation the actual
situation to elaborate the traffic light control system principle of work, has produced
one kind of simple practical city traffic light control system hardware circuit design plan.
Along with the social economy development, the municipal transportation question
more and more arouses people's interest. The person ，the vehicle, the road three
relations coordinations, have become one of important questions which the traffic
control department needs to solve. The municipal transportation control system is uses
in the computer synthesis management system management system which the municipal
transportation data monitor, the street-traffic control lights control and the transportation
unblocks, it is in the modern municipal transportation monitoring command system the
most important constituent. Along with the city vehicle quantity unceasing increase,
many big cities like Beijing, Shanghai, Nanjing and so on had the transportation excess
load movement situation, therefore, from the80's later periods, these cities constructs the
city speed-way in abundance, completes the initial period in the speed-way
construction ,they also once effectively improved the transportation condition. However,
and lacks along with the volume of traffic fast growth to the speed-way system research
and the control, the speed-way not fully plays the anticipated role. But city speed-way
in structure charact eristic, also had decided the city speed-way transportation condition
inevitably receives the speed-way and the ordinary path coupling place transportation
condition restriction. Therefore, how uses the appropriate control method, maximum
limit uses the good consumption large amount of money construction the city
speed-way, alleviates branch with Ramp , the city supports with the peripheral locality
transportation stops up the condition, more and more becomes the main question which
the transportation management and the urban planning department urgently awaits to be
solved. There fore, applied the knowledge through me which studied to design a set of
traffic lights control circuit traffic light control system mainly by the timing circuit,
the host controls the electric circuit, the signal light switch, the pulse signal generating
devices composed.
Key word: The AT89S51;LED show;transportation light
