AUTOMATED TRAFFIC SIGNAL CONTROLLER full report
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#1
02-04-2010, 10:43 PM


AUTOMATED TRAFFIC SIGNAL CONTROLLER

Presented By:
Anand Kokkanavar
Natthaphat Rojanasupamit
Prabhat Kumar Shukla



Main Features of the Controller

Assumes equal traffic density on all the roads.

2. Allows the pedestrians to safely cross the road
during certain periods.

Uses digital logic, can be easily implemented by
using logic gates.

4. Is generalized and can be used for different roads
with slight modification.

5. Can also be exercised manually when desired.



Synchronous Decade Counter

Count from 0 to 9 (0000 to 1001 in binary).

For normal counting, the reset, preset,
count enable and carry in inputs should
all be high.

When count enable is low, the clock
input is ignored and counting stops.

The counter may be preset by placing
the desired binary number on the
inputs A-D, making the preset input
low, and applying a positive pulse to
the clock input.




General Description

A highly stable device for generating accurate
time delays or oscillation.

In the time delay mode of operation, the time is
precisely controlled by one external resistor and
capacitor.
In this Automated Traffic Signal Controller, Timer 555 is used as an Astable Multivibrator to generate clock

signal for the 4-bit counter 74160.





Bibliography

Digital Logic Applications and Design by John M. Yarbrough, Thomson
Fundamentals of Electronic Devices and Circuits by David A. Bell
Fundamentals of Logic Design by Charles H. Roth, Thomson
Synchronous Up/Down Counter by Stan, M. R. and Bufieson, W. P.
electronicsforuefylinux/circuit/nov2002/traffic.pdf
kpsec.freeukcomponents/74series.htm
en.wikipediawiki/555_timer_IC


Attached Files
.ppt   AUTOMATED TRAFFIC SIGNAL CONTROLLER Presentation.ppt (Size: 2.75 MB / Downloads: 1,168)
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santoshyavraj
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05-10-2010, 08:51 AM

I WANT "AUTOMATED TRAFFIC SIGNAL CONTROLLER full report"
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11-10-2010, 10:39 AM


.docx   65.AUTOMATED TRAFFIC SIGNAL CONTROLLER USING AT.docx (Size: 15.38 KB / Downloads: 207)
AUTOMATED TRAFFIC SIGNAL CONTROLLER USING AT-89C51



ABSTRACT:-
In this project and implimentation automated traffic signal controller using AT-89C51, which set the traffic signal counter value depending on the traffic rate in the road. Initially, the input image is background subtracted to extract the foreground objects. The foreground objects are tracked using snake algorithm. The tracked objects are then compared with the predefined templates. The count of number of vehicle is incremented as it encounters a matched object. Based on the count of vehicles, the value for the signal counter is set. In the mean while, the camera is rotated to 180 degrees to view the other side of the road and the same procedure is repeated. In most automated traffic signals the free left-turn condition is provided throughout the entire signal period, which poses difficulties to the pedestrians in crossing the road, especially when the traffic density is high. This controller allows the pedestrians to safely cross the road during
Certain periods.
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jibinjoy
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#4
23-03-2011, 10:26 AM

[/size]Iwant a full project and implimentation report on automatic road traffic controller .
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02-02-2012, 02:43 PM

AUTOMATED TRAFFIC SIGNAL CONTROLLER

.pdf   26182184-Automatic-Traffic-Signal-Controller.pdf (Size: 2.19 MB / Downloads: 217)

INTRODUCTION


Now a days due to ever increasing vehicles on the road, it require a efficient control on the four way junction of road. In order to find a solution to this problem the concept of an automatic traffic controller is conceived. Apart from providing efficient control of traffic, it also eliminate chance of human errors since it function automatically


The automatic traffic controller automatically switches on the four way junction for 15 seconds for direction control.
The main circuit components used are 555-Timer and 4-bit binary synchronous counter (74160). The 555-Timer generates a clock signal for 15 seconds. This signal is used to clock counter circuit. Binary counter is converted to 3 bit–counter to achieve 8 possible cases. The traffic light control is done by different Boolean function of logic gate.


TECHNOLOGY:
Optics and lighting:-
In the mid 1990s, cost-effective traffic light lamps using light-emitting diodes (LEDs) were developed; prior to this date traffic lights were designed using incandescent or halogen light bulbs. Unlike the incandescent-based lamps, which use a single large bulb, the LED-based lamps consist of an array of LED elements, arranged in various patterns. When viewed from a distance, the array appears as a continuous light source



These GAL products can be segmented into two broad categories:
Base products
Extension products
Base Products - Aimed at providing superior design alternatives to bipolar PLDs, these five architectures replace over 98% of all bipolar PAL devices. The GAL16V8 and GAL20V8 replace forty-two different PAL devices. The GAL22V10, GAL20RA10, and GAL20XV10 round out the base products. These GAL devices meet and, in most cases, beat bipolar PAL performance specifications while consuming significantly lower power and offering higher quality and reliability via Lattice’s electrically reprogrammable E2CMOS technology.
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21-04-2012, 11:44 AM

AUTOMATED TRAFFIC SIGNAL CONTROLLER



.pdf   automated traffic signal.pdf (Size: 132.44 KB / Downloads: 55)

This automated traffic signal controller
can be made by suitably programming
a GAL device. (For GAL
programming you may refer to the construction
project and implimentation published on page 52 in
EFY’s September issue.) Its main features
are:
1. The controller assumes equal traffic
density on all the roads.
2. In most automated traffic signals the
free left-turn condition is provided throughout
the entire signal period, which poses
difficulties to the pedestrians in crossing
the road, especially when the traffic den-

sity is high. This controller allows the pedestrians
to safely cross the road during
certain periods.
3. The controller uses digital logic,
which can be easily implemented by using
logic gates.
4. The controller is a generalised one
and can be used for different roads with
slight modification.
5. The control can also be exercised
manually when desired.
The time period for which green, yellow,
and red traffic signals remain ‘on’
(and then repeat) for the straight moving
traffic is divided into eight units of 8
seconds (or multiples thereof) each. Fig.
1 shows the flow of traffic in all permissible
directions during the eight time units
of 8 seconds each. For the left- and rightturning
traffic and pedestrians crossing
from north to south, south to north, east
to west, and west to east, only green and
red signals are used.
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