Determine an appropriate yellow interval for a signal phase under the following conditions below:
? Approach speed limit: 45 mi/h
? Approach grade: 2% downgrade
? Assumed perception-reaction time: 1.0 sec
? Assumed deceleration rate: 11.2 ft/sec2
? Assumed average vehicle length: 20 ft
? Width of intersection to be crossed: 60 ft
What will be an ideal response?
Use Equation 8.5:
A yellow interval of 5.5 seconds is recommended.
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