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7/29/2019 road congestion control
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ABSTRACT
Present day traffic light controllers (TLC) are based on pre defined specifichardware functioning according to programs which does not have
flexibility on real time basis.
Due to fixed time of signaling the vehicles tend to spend more time in
waiting for signals in spite of prevalent road conditions.
To overcome this condition we propose intelligent traffic light controller(ITLC) which makes use of sensor technology along with embedded
technology.
The red/green signaling will be decided on the basis of vehicle congestion
in the respective roads
GSM cell phone interface is also provided for those who wish to obtainlatest traffic position on congested roads.
There is provision to activate emergency mode for the ambulance or fire
engine to pass through the signals without interruption.
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DISADVANTAGES OF EXISTING SYSTEM
Heavy traffic jams.
No traffic, but still need to wait. Emergency car struck in traffic jam.
Lack of traffic information to users.
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OBJECTIVE
To introduce a dynamic concept for
handling/regulating road congestion.
Our proposal of the model is adaptive and
interactive. Adaptive ->automatic regulation of traffic signal
timing based on present congestion.
Interactive->live update of traffic condition atrequested junction through SMS.
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BASIC CONCEPT OF ITLC
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WORKING
The IR sensors are mounted on the road and undernormal condition the IR receiver continuouslyreceives signal from the transmitter.
When the vehicle passes through its path the signalcontinuity is temporarily hindered. In case of heavytraffic jams the hindrance time is high.
This time period is used to determine the density of
the traffic on the roads. Entire timing and controlling action is monitored by
the AT89c52 micro controller.
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Based on this timing the signaling time of the red
and green signals changes, which is determined by
the controller.
In case of higher congestion the green signal timing
on that particular road is made high than usual.
There is also an provision for the drivers to knowabout the congestion density of the lanes he /she
wishes for using GSM services.
The driver will get the current status messages about
the density on requisition to an predefined number.
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GSM
mobile
phone
BLOCK DIAGRAM
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CIRCUIT DIAGRAM
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LANE 4
LANE 3
LANE 2
LANE 1
IR PAIR 1
IR PAIR 2
RESULT
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WORKING LOGIC The lanes are marked on the original snapshot for easy reference.
Initially G1 is on for 40 sec while R2,R3,R4 are on inrespective lanes.
Next the signal from R2 switches over to G2 (ie) G2 is on for 40 secwhile red signal is present in other lanes.
This procedure continues in cyclic way for all the four lanes andtraffic density is said to be normal.
Now at lane 4 if IR pair1 signal is interrupted the timing for G1changes from 40 sec to 60 sec (medium traffic condition)
Else if both IR pair 1 & 2 signals are interrupted then heavy traffic
condition is observed and G4 signaling time changes to 80 sec. If the driver sends message TL@1 or TL@2 or TL@3 or TL@4 to
the assigned number 9042659262 an alert message about the
present traffic condition of the requested lane is received.
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CONCLUSION
The improvement of town traffic condition is largely dependent on the
modern ways of traffic management and control. Advanced traffic signal
controllers and control system contribute to the improvement of the
traffic problem. The intelligent of traffic signal controller is introduced in
this project with powerful functions and hardware interface.
It is observed that the proposed Intelligent Traffic Light Controller is more
efficient than the conventional controller.
Moreover, the designed system has simple architecture, fast response
time, user friendliness and scope for further expansion.
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SCOPE FOR FUTURE WORK
Our proposed model can be implemented in mega scale with further
improvement in budget as in activating emergency mode concept which
might use RFID or any other technology to detect vehicles like
ambulance/fire engine/police van before 50 m/1km from the signal and
thus making the signal to be in green state so that they can pass through
easily.
This project can be still developed with SMS providing the alternative
route in case of congestion in particular route to the customers.
Mega scale project though cannot be implemented using IR sensors,
image processing method can be implemented.
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REFERENCES
Design of intelligent traffic light controller using atmel controllers-2nd international conference on emerging engineering trends
2009(978-0-765-3884-6).
Pleen,Roelant Schouten, Design and organization of autonomous
systems : ITLC ISBN 45567-45/2010.
Chen and Yang, Minimization of travel time and weighted numberof stops in a traffic-light network, European Journal of
Operational Research. Vol. 144, pp565-580.
Roberto Horowitz , Pravin Variya control design of automated
highway system proceedings of the IEEE,2009
www.path.berkley.edu/~variya/papers_ps.dir/ahdesign.pdf
http://www.path.berkley.edu/~variya/papers_ps.dir/ahdesign.pdfhttp://www.path.berkley.edu/~variya/papers_ps.dir/ahdesign.pdf7/29/2019 road congestion control
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THANK YOU