Traffic Signals 101
description
Transcript of Traffic Signals 101
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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• 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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• 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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• 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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• 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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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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Figure 1
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Loop Placement
Figure 2