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A REAL TIME TRAFFIC LIGHT CONTROL SCHEME FOR REDUCING
VEHICLES CO2 EMISSIONS
Abstract
An embedded system is a special-purpose computer system designed
to perform a
dedicated function. Unlike a general-purpose computer, such as a
personal computer, an
embedded system performs one or a few pre-defined tasks, usually
with very specific
requirements. Since the system is dedicated to specific tasks,
design engineers can optimize it,
reducing the size and cost of the product. Embedded system
comprises of both hardware and
software. Embedded system is fast growing technology in various
fields like industrial
automation, home appliances, automobiles, aeronautics etc.,
embedded technology uses PC or a
controller to do the specified task and the programming is done
using assembly language
programming or embedded C.
Project Description
Global warming is a very serious problem which is becoming ever
worse as the growth in
the number of vehicles. In the fast emerging world, vehicles
become mandatory for all purposes.
The vehicle emissions pollute the atmosphere thereby leading to
many hazardous effects. So it
becomes essential need to develop a system which reduces the
emission of CO2 from vehicles.
This project involves a real time traffic lights control scheme
for reducing vehicles CO2
emissions based on the Electronic Toll Collection (ETC)
installed vehicles. Real time road
conditions are obtained by wireless communication between the
vehicles and the traffic lights
based on the Dedicated Short Range Communication (DSRC)
technology. Usually, vehicles
follow stop-and-go driving scheme. This will consume more fuel
and emit more CO 2 thanconstant speed driving. To reduce vehicles'
CO2 emissions, vehicles' travel should be smoothed
by reducing the stop-and-go times.
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This project involves a three-level structure to realize dynamic
traffic light control for
smoothing vehicles' travel. In level-1, an electronic toll
collection (ETC) system is employed for
collecting road traffic flow data and calculating the
recommended speed. In level-2, radio
antennas are installed near the traffic lights. Road traffic
flow information can be obtained by
wireless communication between the antennas and ETC devices. In
level-3, a traffic control
server controls the traffic and controls the signal being
indicated.
After smoothing vehicles' travels, more vehicles can pass
intersections with less waiting
time and fewer short-time stops; this results in drastic
reduction of CO2 emissions. The average
waiting time, short-time stop times, and CO2 emissions are
greatly reduced, and the nonstop
passing rate is greatly improved in this project.
Block Diagram
Transmitter section:
MICRO
CONTROLLER
POWER SUPPLY
TRAFFIC LIGHT
CONTROL UNIT
ZIGBEE
TRANSCEVIER
GPS
RS 232
LCD
