10-04-2017, 09:19 PM
DYNAMIC TRAFFIC CONTROL & MANAGEMENT
One of the most pressing problems faced by people in large cities & towns is
the congestions of roads leading to those seemingly inadvertent traffic jams. Most of
the signals are pre timed i.e. the signal duration is fixed so even if there is less traffic
on one of the roads the signal duration remains the same. Sensors are used to
determine the traffic on a road & accordingly change the duration of the signal.
Moreover all the signals are connected to a central computer where a database is
maintained of traffic at different time during the day which can be helpful in traffic
analysis & city management. Three Sensors are placed on each road of a crossroad,
the output of the sensors are given to microcontroller (8951/8952), the controller
then calculates the timing of each signal according to the traffic on each road. This
data is also sent to the PC using MAX232, where a database is maintained.