Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 20, Problem 17P
To determine
The slab thickness according to AASHTO Alternate Design method of a rigid pavement.
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Q1: For the gravity concrete dam shown in the figure, the following data are available:
-Unit weight of concrete (Y)-2.4 ton/m
Neglect Wave pressure, silt pressure, ice force and carth quake force)
-0.65, (7) 1 ton/m'
Find factor of safety against sliding and overturning (F.Sas & F.Ser), If heel and toe stresses (P &
Pan) are 57.17ton/m² and 84.53 ton/m² respectively.
Solve in table on paper
w.s.i
83m
10m
8m
80m
In this question, we are going to learn about the gravity model. As discussed in class, an
alternative and frequent way to model the demand is doing it in 4 steps:
Generation/Attraction, Distribution, Mode choice, and Route choice. In the
generation/attraction step, we estimate the number of trips that depart and arrive from each
zone, in a similar way as we studied generation in the lectures. The idea of the distribution step
is, taking the generation and attraction numbers as known, estimate the number of people
going from each zone to each zone. Let's be precise:
Consider that you know O₂ for every zone i, representing the number of users that have i as
their origin. Similarly, you know Dj, representing the number of users that have j as their
destination. We want to estimate Mij, i.e., the number of users going from i to j. The matrix M
=
a2+
Assume an origin is connected to a destination with two routes. Assume the travel time of each
route has a linear relationship with the traffic flow on the route (t₁ = α₁ + b₁x₁ ; t₂
b2x2). Determine under what condition (e.g. a relationship among the parameters of the
performance functions) tolling cannot reduce the total travel time of the two routes.
Chapter 20 Solutions
Traffic and Highway Engineering
Ch. 20 - Portland cement concrete consists of what four...Ch. 20 - List and briefly describe the five main types of...Ch. 20 - What is the main requirement for the water used in...Ch. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
Ch. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Repeat Problem 20-12, with the slab containing...Ch. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - An existing rural 4-lane highway is to be replaced...Ch. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27P
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