ROAD SIGNS

Traffic signs or road sign is the most used and least costly of traffic controls devices.

PURPOSE OF ROAD SIGNALS;

– To achieve orderly movement of traffic.

– To control speed of vehicles.

– To control traffic behavior such as parking.

– To direct traffic routes.

– To guide road users of hazardous conditions.

– to reduce the chances of accidents.

DESIGN AND LOCATION OF ROAD SIGNS

The I.R.C has the code for road signs with

an intensions to achieve uniformity of

design and applications of road signals.

* I.R.C;-Indian Road Congress

The uniformity of design include shape,

colour, dimensions and illumination.

The details of standard signs including letter

style, size, colour are prescribed.

The standard legends consisting of symbols

and word messages are also mentioned.

The general rule is to locate signs on the left

hand side of the road.

But under certain circumstances such as sharp

curves to the left, the signs are placed on the

right hand side or channelizing island.

The overhead signs are used on wide

expressways.

TYPES OF ROAD SIGNS

ROAD SIGNS

GUIDE OR INFORMATORY

REGULATORY OR MANDATORY

WARNING OR CAUTIONARY

These signs are used to give useful information

It shows the route designs, destinations,

directions distances, services or other

geographical informations.

The common guide signs are;

end of speed limit;

flood marks;

location of petrol pump, hospital, etc;

names of streets and highways;

parking places;

public telephones; etc.

**no through road; this sign is used at the entrance to a road from where there is no exit

**

ANAND

ANAND

They provide notice of statutory traffic and

regulations.

They are meant to inform the public about the

traffic laws, regulations, and legal

requirements.

Some of the regulatory signs are;

Certain speed limit;

No entry;

No parking;

Prohibit of use of horns;

U turn prohibited;

Left turn or right turn prohibited; etc.

50 3.5m

SPEED LIMIT WIDTH LIMIT HEIGHT LIMIT LOAD LIMIT

5T

ONE WAY SIGNNO ENTRY

RIGHT/LEFT TURN PROHIBITED

OVER TAKINGPROHIBITED

HORN PROHIBITED

VEHICLES PROHIBITED

IN BOTH DIRECTION

U-TURNPROHIBITED

PARKING PROHIBITED

These warnings are provided to call attention to

conditions which are potentionally hazardous to

traffic operations.

These signs require caution and may warrant a

reduction in speed for safety

The cautionary signs which have a significance

during dark hours must be reflectorized or

illuminated.

As per the I.R.C standardization, a warning sign is in the form of an equilateral triangle with side of 450mm supported on post at a height of 2750mm above the ground level up to the base of triangle.

Some of the typical warning signs are;

Cross roads;

Narrow bridge;

Dead end or side road;

School;

Steep hill;

Hair pin bend;

Zig zag turns;

Men at work; etc

not capable of providing continuous guidance through

complicated areas and hazardous locations which

road markings can do under normal conditions.

not capable of being read at long distances which can

be done with flashing or continuous traffic signals

indications.

They are not capable of spacing vehicles platoons on

busy streets so that the same traffic performance is

obtained as with traffic signals.

Thank you

SUBMITTED TO;

HELEN THOMAS

ASST.PROFESSOR

CIVIL DEPARTMENT

MITS