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6.0 Summary of Recommendations

6.5.3 Island Traffic Signals

Guideline Island Traffic Signal Guideline 1
Title ITS Signal Size
Text Subject to other unique toll plaza considerations, the ITS should consist of 8 inch diameter, LED traffic signal heads.
Commentary None

 

Guideline Island Traffic Signal Guideline 2
Title ITS Location
Text The ITS should be installed approximately 15 feet beyond the downstream edge of the presence or arming loop.
Commentary This location assumes 15 feet represents the detection length of a typical vehicle, the installation of a presence loop at the collection point, and there are no physical constraints to this location. Otherwise, alternative locations should be considered and field tested.

 

Guideline Island Traffic Signal Guideline 3
Title ITS Horizontal Clearance
Text A horizontal clearance of 12 inches should be used from the face of the toll island or raised barrier to the nearest edge of the ITS signal head.
Commentary None

 

Guideline Island Traffic Signal Guideline 4
Title ITS Height
Text Subject to the known or forecasted traffic mix, the height to the bottom of all ITS should be in the range of 4 to 5 feet.
Commentary None

 

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