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Transportation Engineering
Akhtar Abbas Assistant Professor
The University of Lahorewww.uol.edu.pk/ce
Department of Civil Engineering,(10-05-2012)
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The devices used to control and regulatethe traffic are known as traffic control
devices. The most common of these area. Signs
b. Signals
c. Marking
d. Island
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a. Traffic Signs. Traffic sign is a devicemounted on a fixed or portable support
to convey a definite message by meansof words or symbols. The traffic signshave been divided into the following
three categories. They area) Regulatory signs
b) Warning signs c) Informatory signs
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a) Regulatory signs. These are mandatorysigns. The noncompliance of these signs
is offence and the defaulter can beprosecuted in a court of law. These signsare used to inform road users of certain
laws and regulations to provide safetyand free flow of traffic. These include allsigns which give notice of special
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obligations or restrictions which the roadusers must comply.
b) Warning or cautionary signs. Thesesigns are used to warn road users of theexistence of certain hazardous conditions
either on or adjacent to the road way towarn the motorists to caution to take thedesired action.
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c) Informatory signs. These signs areused to guide road users along routes,
inform them about destination anddistance to identify points of geographicaland historical interest and provide
information that will make road traveleasier, safe and pleasant.
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For remaining part of topic
a. Signals
b. Marking
c. Island
literature will be provided
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