road congestion control

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.pdf


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road congestion control