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Traffic Signs

The general principle of traffic signs is to make amessage known quickly, (70mph) accurately,with minimum reading skills required.

This should allow traffic to meet the goal of theTS. Safe, rapid, and efficient transportation.

!oor signs, signal, and traffic markings can leadto a "reak down in the system.

They are recogni#a"le "y shape and color,message and diagram.

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There are three types

(classifications) of traffic signs

They are regulatory

$arning

and guide.

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%egulatory signs

&. Stop signs. Stop signs are red octagons and mean come to a complete stop.They are the only sign so shaped. 'asily recogni#ed at a distance.

. ield signs. ield signs are red and triangular. This sign requires a dri*er toallow other dri*ers first use of the road.

+. Speed limit signs. Speed limit signs are white with "lack lettering. They are

also *ertical rectangles. They can also "e orange. construction speed limitis a regulatory sign as well. -orth arolina posts a "lack and white sign alongwith the orange work #one sign to remind dri*ers of this fact. There can "eminimum speed limits too. These are normally found on interstate highways.lthough there could "e minimum speed limits elsewhere, they must first "eposted "y the highway department.

/. ther regulatory signs also include1 2o not enter, one way, no passing, no left

or 3 turn. These are com"inations of white, "lack and4or red.

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$arning signs

$arning signs are information to warn dri*ers of ha#ards theyare a"out to encounter.

They are usually yellow and diamond shaped. There aremessages to help dri*ers understand these ha#ards.

lthough these are not regulatory signs, not heeding thewarning may result in an accident and4or a citation for dri*ingtoo fast for e5isting conditions.

There are se*eral other shapes used for warning signs.School #one warning signs are a pentagon. %ailroad warningsigns are round.

-o passing signs are a pennant shaped sign and are placedat the "eginning of the no passing #one and on the left side ofthe road to make them *isi"le to dri*ers trying to pass.

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6uide signs

6uide signs. 6uide signs are used to

inform dri*ers of routes, gas, food,

lodging, hospitals, rest areas and others.

6uide signs are designated

"y color and shape.

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lue is motorist ser*ices. 6as,

food, lodging, hospitals etc.

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rown is for recreational areas.

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The asic Speed 8aw

The asic Speed law requires that a dri*eralways dri*e at a speed safe for e5isting

conditions. dri*er may "e sighted for

speeding when traffic, roadways, orweather conditions are not ideal.

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There are no a"solute9right of

ways9 in traffic

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%ight of $ay 8aw

'ach law is written descri"ing which

dri*er yieldsright of way.

:or e5ample1 the person on the left yieldsto the

person on the right. The turning dri*er yieldstothe dri*er going straight. The person entering

traffic yieldsto those in traffic.

-o one, including emergency *ehicles, has

a"solute right of way. ou are required to yieldto

them.

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The ighway Transportation

System. (TS)

The goal of the TS is to pro*ide safe,

rapid, and efficienttransportation of

persons and goods from one location to

another, in an en*ironmentally sound

fashion.

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There are at least fi*e types of

traffic light systems a. !rogressi*elights are set up so that traffic mo*ing at the correct speed

will "e a"le to keep mo*ing as the lights change in sequence.". Traffic acti*atedlights are designed to change according to traffic loads.-o traffic, no green light, many *ehicles, longer green lights. The key toefficient use of these lights is to know what and how each intersection is setup. The use of computer assisted traffic lights are also traffic acti*ated. They

try to anticipate the traffic coming, not react to traffic that has ;ust stopped.c. Timedlights are the least e5pensi*e and therefore used in many smallercommunities. They are set for so many seconds green for each direction oftraffic.d. !edestrianacti*ated lights are used at cross walks to aid their crossing of"usy streets.e. %ailroadgrade crossing lights are used to warn dri*ers of trains in closepro5imity to the crossing.

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