Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 6, Problem 23P
To determine
The expected number of accepted gaps that will be available for minor road vehicles during the peak hour.
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the following data were taken on five vehicles travelling consecutively 1.5km portion of the NLEX.
Vehicle Time(minute)
1
1.2
2
1.0
3
1.4
4
1.3
5
1.1
Determine the density of traffic in (Veh per km)
3.33
3.83
4.33
2.83
The traffic from a suburban area to a city uses the following five shorter routes, as shown
below.
Access from
Suburban
Route 4
Route 1
Route 5
Route 2
Route 3
Access to
City
The models below show the travel time as a function of traffic flow on each route.
t₁ = 18 + 4.5 x₁
t₂ = 21+ 7.0 x₂
t3 = 26 +
4.9 x3
t4 = 29+
3.4 x4
t5 = 34 + 0.3 x5
Where: t; is travel time on route 'i' (in minutes) and x; is traffic flow on route 'i' (in 1000
vehicles).
The table below gives data on accepted and rejected gaps of vehicles on the minor
road of an unsignalized intersection. If the arrival of major road vehicles can be
described by the Poisson distribution, and the peak hour volume is 1100 veh/h, deter-
mine the expected number of accepted gaps that will be available for minor road vehi-
cles during the peak hour.
6-20
Number of
Accepted Gaps >t
Number of
Gap (t) (s)
Rejected Gaps >t
1.5
92
3
2.5
52
18
3.5
30
35
4.5
10
62
5.5
2
100
Chapter 6 Solutions
Traffic and Highway Engineering
Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10P
Ch. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - The arrival times of vehicles at the ticket gate...Ch. 6 - Prob. 27P
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