A westbound section of freeway currently has three 12-ft wide lanes, a 6-ft right shoulder, and no ramps within 3 miles upstream and downstream of the segment midpoint. It is on rolling terrain with 10% heavy vehicles and is operating at capacity with a peak-hour factor of 0.9. If the road is expanded to five 11-foot lanes with a 2- foot right shoulder, and traffic after the expansion is projected to increase by 5% with the same heavy vehicle percentage and peak-hour factor. What is the LOS and estimated density BEFORE and AFTER expansion? Before expansion: Density = 44.46 LOS = E After expansion: New Density = 26.67 New LOS = D

A westbound section of freeway currently has three 12-ft wide lanes, a 6-ft right shoulder, and no ramps within 3 miles upstream and downstream of the segment midpoint. It is on rolling terrain with 10% heavy vehicles and is operating at capacity with a peak-hour factor of 0.9. If the road is expanded to five 11-foot lanes with a 2- foot right shoulder, and traffic after the expansion is projected to increase by 5% with the same heavy vehicle percentage and peak-hour factor. What is the LOS and estimated density BEFORE and AFTER expansion? Before expansion: Density = 44.46 LOS = E After expansion: New Density = 26.67 New LOS = D

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter9: Capacity And Level Of Service For Highway Segments

Section: Chapter Questions

Problem 8P

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