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Traffic Signals 101

Traffic Signals 101. Topic 8 Head/Loop Placement. Signal 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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Traffic Signals 101

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  1. Traffic Signals 101 Topic 8 Head/Loop Placement

  2. Signal 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

  3. Signal 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

  4. Signal 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

  5. Signal 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

  6. Signal 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

  7. Head Placement • Traffic Signal Head Placement

  8. Head Placement • Traffic Signal Layout

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

  10. DECISION Loop Placement Animation

  11. Loop Placement Figure 1

  12. Loop Placement Figure 2

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