Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 3, Problem 24P
To determine
The minimum distance required for the road sign should be located from the diversion.
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Question 4
One stretch of two-lane two-way roadway that traverses through level terrain is expected
to carry 1400 vehicle per hour. Determine the Level of Service (LOS) in the peak
direction for the road based on average travel speed (ATS) if the characteristics of the
roadway are as follows:
Table Q4-1
Percentage of Trucks
Percentage of Recreational Vehicle
Peak Hour Factor
10
0.97
60:40
60
Percent Directional Split
Percent no-passing Zone
Lane Widths
Shoulder Widths
Design Speed
Road Length
Access Points
3.35 m
1.2 m
96 km/h
8 km
10 access points per km
State all assumption (if any) used in calculation..
1- You are assigned to evaluate the level of service for a section of a six-lane rural highway
that stretches along a level terrain with shoulder width of eight ft and lane width of
twelve ft. The average annual daily traffic is fifty-five thousand vehicles per day with ten
percent trucks, five percent buses, and three percent recreational vehicles. The peak hour
factor is 0.80 and the directional split is fifty-fifty. The distance between consequent
interchanges is two miles. Calculate the level of service for this highway section and
show your calculation steps.
Problem 23: A motorist traveling at 100 kph on an expressway intends to leave the expressway
using an exit ramp with a maximum speed of 50 kph. At what point on the expressway should the
motorist steps on her brakes in order to reduce her speed to the maximum allowable on the ramp
just before entering the ramp? The section of the expressway has a downgrade of 3%.
Acceleration is 3.5 m/sec?.
Chapter 3 Solutions
Traffic and Highway Engineering
Knowledge Booster
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