2015 Traffic Signals 101

Topic 8Head and

Loop Placement

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gySignal Heads and Indications

• Pedestrian Signal Head• WALKING PERSON

(symbolizing WALK)• UPRAISED HAND

(symbolizing DONT WALK)

• Countdown numbers • Comprised of two

components; • Pedestrian signal housing • Pedestrian signal

indication

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gySignal Heads and Indications

• Pedestrian Signal Housing• Protects the light source

and other components• Indication mounting door

and sun visor• Pedestrian Signal

Indication• LED hand and man

countdown indication module that is installed within the pedestrian signal housing

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gySignal Heads and Indications

• Vehicle Signal Head • Is an assembly of one

or more signal sections that is provided for controlling vehicle traffic movements on one or more approaches

• This assembly of signal sections also includes a background shield

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gySignal Heads and Indications

• Signal Section • Assembly of a signal

housing, signal lens, if any, and light source with necessary components to be used for displaying one signal indication

• Section is comprised of two components

• Signal housing • Signal indication 5

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gySignal Heads and Indications

• Signal Housing • Protects the light source and other

required components• Includes a hinged opening (with

visor) in which the signal indication is mounted

• Signal Indication• Is the illumination of a signal lens or

equivalent device• Light Emitting Diode (LED)

indication module • Installed within the signal housing

• Housing and indication make up the section 6

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gyHead Placement

• Traffic Signal Head Placement

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8

Head Placement• Traffic Signal Layout

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gyLoop Placement

• Loop Detector Placement Design• Guaranteed Green• Safety• Failsafe• Maintenance• Operation

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Loop Placement

DECISION

Animation

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gyLoop Placement

Figure 1

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Loop Placement

Figure 2