Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 4, Problem 8P
To determine
The plot of expected noncompliance percentages versus the associated speed limit on a graph and recommend the speed for the road with reasons.
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To determine the ADT on the road, the data was collected as shown below on a Tuesday during the following. Consider If the traffic is expected to be 180% from the current traffic up to May 2030, Table 1: Traffic volume at specific time 7:00–8:00 a.m. 8:00 –9:00 a.m 9:00–10:00a.m 10:00–11:00 .m 11:00 –12 noon 150 120 130 50 20
Spot speed study has been carried out on a highway and collected data is shown in the
table below.
Speed range
(kmph)
No. of vehicles
observed
0-10
10
10-20
13
20-30
15
30-40
12
40-50
16
Determine the design speed for checking the geometric design of the highway.
Consider only a single lane of a highway. Based on extensive data from an urban freeway it is assumed thatfree-flow speeds (i.e., there are no jams) can best be represented by a Normal distribution with mean andstandard deviation 119 km/h and 13.1 km/h, respectively.1. What is the probability that the speed of a randomly selected vehicle is between 100 and 120 km/h?2. What is the expected number of vehicles between two vehicles that exceed the posted speed limit of100 Km/h?
You can use the Z table for calculating the final answer. You can also write your final answer in form ofR functions or as PDF/CDF of statistical distributions with correct arguments.
Chapter 4 Solutions
Traffic and Highway Engineering
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