Explanation Given: The number of seconds n for the yellow light is critical to safety at a traffic signal. The formula for setting the time is: n = t + 0.5 v a + w + l v . Here, t is the perception-reaction time of a driver in seconds, v is the average approach velocity in feet per second, a is the deceleration rate in feet per second per second, w is the crossing-street width in feet, and l is the average vehicle length in feet. If we assume that the average perception-reaction time is 1 second, the approach velocity is 40 miles per hour ( 58 To determine (b) To calculate: The lengths of the yellow light times compare when the crossing street for one signal is 10 feet wider than the crossing street for another signal. To determine (c) To calculate: The value of n ( 70 ) . Also explain in practical terms what the answer means. To determine (d) To calculate: The crossing street width that would warrant a 5-second yellow light.

6th Edition

ISBN: 9781337801287

Author: Crauder

Publisher: MCGRAW-HILL HIGHER EDUCATION

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Question

Chapter 3.2, Problem 26E

To determine

(a)

To calculate:

The minimum time the yellow light should be on, no matter what the width of the crossing street.

To determine

(b)

To calculate:

The lengths of the yellow light times compare when the crossing street for one signal is 10 feet wider than the crossing street for another signal.

To determine

(c)

To calculate:

The value of n(70). Also explain in practical terms what the answer means.

To determine

(d)

To calculate:

The crossing street width that would warrant a 5-second yellow light.

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Chapter 3.2, Problem 25E

Chapter 3.2, Problem 27E

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(a) To calculate: The minimum time the yellow light should be on, no matter what the width of the crossing street.

Solution Summary: The author calculates the minimum time the yellow light should be on, no matter the width of the crossing street.

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(a) To calculate: The minimum time the yellow light should be on, no matter what the width of the crossing street.

(b) To calculate: The lengths of the yellow light times compare when the crossing street for one signal is 10 feet wider than the crossing street for another signal.

(c) To calculate: The value of n(70). Also explain in practical terms what the answer means.

(d) To calculate: The crossing street width that would warrant a 5-second yellow light.

Want to see the full answer?

Chapter 3 Solutions

(a)

To calculate:

The minimum time the yellow light should be on, no matter what the width of the crossing street.

(b)

To calculate:

The lengths of the yellow light times compare when the crossing street for one signal is 10 feet wider than the crossing street for another signal.

(c)

To calculate:

The value of n(70). Also explain in practical terms what the answer means.

(d)

To calculate:

The crossing street width that would warrant a 5-second yellow light.