TRAFFIC ENGINEERING Mc shane-SOLUTIONS
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
TRAFFIC ENGINEERING
5TH Edition
Roger P. Roess, Elena S. Prassas, William R. McShane
SOLUTIONS MANUAL
March 2018
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
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,TRAFFIC ENGINEERING Mc shane-SOLUTIONS
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
Index
Solutions to Problems in:
Page
Chapter 2 ………………………………………………………………………………. 1
Chapter 3 ………………………………………………………………………………. 3
Chapter 4 ………………………………………………………………………………. 9
Chapter 5 ………………………………………………………………………………. 11
Chapter 6 ………………………………………………………………………………. 17
Chapter 7 ………………………………………………………………………………. 23
Chapter 8 ………………………………………………………………………………. 25
Chapter 9 ………………………………………………………………………………. 31
Chapter 10 ………………………………………………………………………………. 37
Chapter 11 ………………………………………………………………………………. 47
Chapter 12 ………………………………………………………………………………. 55
Chapter 13 ………………………………………………………………………………. 67
Chapter 14 ……………………………………………………………………………..... 73
Chapter 15 ……………………………………………………………………………….. 85
Chapter 16 ……………………………………………………………………………….. 103
Chapter 17 ……………………………………………………………………………….. 111
Chapter 18 ……………………………………………………………………………….. 115
Chapter 19 ……………………………………………………………………………….. 123
Chapter 20 ……………………………………………………………………………….. 147
Chapter 21 ……………………………………………………………………………….. 161
Chapter 22 ……………………………………………………………………………….. 169
Chapter 23 ……………………………………………………………………………….. 179
Chapter 24 ……………………………………………………………………………….. 183
Chapter 25 ……………………………………………………………………………….. 185
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
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,TRAFFIC ENGINEERING Mc shane-SOLUTIONS
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
Page
Chapter 26 ………………………………………………………………………………. 197
Chapter 27 ………………………………………………………………………………. 203
Chapter 28 ………………………………………………………………………………. 213
Chapter 29 ………………………………………………………………………………. 223
Chapter 30 ………………………………………………………………………………. 239
Chapter 31 ………………………………………………………………………………. 259
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
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, TRAFFIC ENGINEERING Mc shane-SOLUTIONS
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
Solutions to Problems in Chapter 2
Transportation Modes and Characteristics
Problem 2-1
The capacity of a street or highway is affected by a) the physical design of the roadway
– such features as the number of lanes, free-flow speed, and geometric design, b) the
traffic composition – particularly the presence of trucks and local buses, and c) the control
environment – such features as lane use controls, signalization, curb lane controls, etc.
Problem 2-2
The capacity of a rapid transit line is affected by: the number of tracks, the person-
capacity of each rail car, the length of trains, and the minimum headways at which trains
can operate. The latter is limited by either the control system or station dwell times.
Problem 2-3
The key element here is that trains may operate 1.8 minutes apart. In this case, the dwell
time controls this limit, not the train control system, which would allow closer operation.
Thus, one track can accommodate 60/1.8 = 33.3 (say 33) trains/h.
Each train has 10 cars, each of which accommodates a total of 50+80 = 130 passengers.
The capacity of a single track is, therefore:
33*10*130 = 42,900 people/h
Problem 2-4
From Table 2-5 of the text, a freeway with a free-flow speed of 55 mi/h has a vehicle-
capacity of 2,250 passenger cars/h.
Traffic contains 10% trucks and 2% express buses, each of which displaces 2.0
passenger cars from the traffic stream. At capacity, there are:
2,250*0.10 = 225 trucks
2,250*0.02 = 45 express buses
Each of these displaces 2.0 passenger cars from the traffic stream. Thus, the 225+45 =
270 heavy vehicles displace 2*270 = 540 passenger cars from the traffic stream. Thus,
the number of passenger cars at capacity is:
2,250 – 540 = 1,710 passenger cars
Using the vehicle occupancies given in the problem statement, the person-capacity of
one lane is:
(1710*1.5)+(225*1.0)+(45*50) = 5,040 persons/h
1
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
Page 4 TRAFFIC ENGINEERING Mc shane-SOLUTIONS MANUAL.pdf
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
TRAFFIC ENGINEERING
5TH Edition
Roger P. Roess, Elena S. Prassas, William R. McShane
SOLUTIONS MANUAL
March 2018
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
Page 1 TRAFFIC ENGINEERING Mc shane-SOLUTIONS MANUAL.pdf
,TRAFFIC ENGINEERING Mc shane-SOLUTIONS
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
Index
Solutions to Problems in:
Page
Chapter 2 ………………………………………………………………………………. 1
Chapter 3 ………………………………………………………………………………. 3
Chapter 4 ………………………………………………………………………………. 9
Chapter 5 ………………………………………………………………………………. 11
Chapter 6 ………………………………………………………………………………. 17
Chapter 7 ………………………………………………………………………………. 23
Chapter 8 ………………………………………………………………………………. 25
Chapter 9 ………………………………………………………………………………. 31
Chapter 10 ………………………………………………………………………………. 37
Chapter 11 ………………………………………………………………………………. 47
Chapter 12 ………………………………………………………………………………. 55
Chapter 13 ………………………………………………………………………………. 67
Chapter 14 ……………………………………………………………………………..... 73
Chapter 15 ……………………………………………………………………………….. 85
Chapter 16 ……………………………………………………………………………….. 103
Chapter 17 ……………………………………………………………………………….. 111
Chapter 18 ……………………………………………………………………………….. 115
Chapter 19 ……………………………………………………………………………….. 123
Chapter 20 ……………………………………………………………………………….. 147
Chapter 21 ……………………………………………………………………………….. 161
Chapter 22 ……………………………………………………………………………….. 169
Chapter 23 ……………………………………………………………………………….. 179
Chapter 24 ……………………………………………………………………………….. 183
Chapter 25 ……………………………………………………………………………….. 185
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
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,TRAFFIC ENGINEERING Mc shane-SOLUTIONS
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
Page
Chapter 26 ………………………………………………………………………………. 197
Chapter 27 ………………………………………………………………………………. 203
Chapter 28 ………………………………………………………………………………. 213
Chapter 29 ………………………………………………………………………………. 223
Chapter 30 ………………………………………………………………………………. 239
Chapter 31 ………………………………………………………………………………. 259
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
Page 3 TRAFFIC ENGINEERING Mc shane-SOLUTIONS MANUAL.pdf
, TRAFFIC ENGINEERING Mc shane-SOLUTIONS
TRAFFIC
MANUAL
ENGINEERING Mc shane-SOLUTIONS MANUAL
Solutions to Problems in Chapter 2
Transportation Modes and Characteristics
Problem 2-1
The capacity of a street or highway is affected by a) the physical design of the roadway
– such features as the number of lanes, free-flow speed, and geometric design, b) the
traffic composition – particularly the presence of trucks and local buses, and c) the control
environment – such features as lane use controls, signalization, curb lane controls, etc.
Problem 2-2
The capacity of a rapid transit line is affected by: the number of tracks, the person-
capacity of each rail car, the length of trains, and the minimum headways at which trains
can operate. The latter is limited by either the control system or station dwell times.
Problem 2-3
The key element here is that trains may operate 1.8 minutes apart. In this case, the dwell
time controls this limit, not the train control system, which would allow closer operation.
Thus, one track can accommodate 60/1.8 = 33.3 (say 33) trains/h.
Each train has 10 cars, each of which accommodates a total of 50+80 = 130 passengers.
The capacity of a single track is, therefore:
33*10*130 = 42,900 people/h
Problem 2-4
From Table 2-5 of the text, a freeway with a free-flow speed of 55 mi/h has a vehicle-
capacity of 2,250 passenger cars/h.
Traffic contains 10% trucks and 2% express buses, each of which displaces 2.0
passenger cars from the traffic stream. At capacity, there are:
2,250*0.10 = 225 trucks
2,250*0.02 = 45 express buses
Each of these displaces 2.0 passenger cars from the traffic stream. Thus, the 225+45 =
270 heavy vehicles displace 2*270 = 540 passenger cars from the traffic stream. Thus,
the number of passenger cars at capacity is:
2,250 – 540 = 1,710 passenger cars
Using the vehicle occupancies given in the problem statement, the person-capacity of
one lane is:
(1710*1.5)+(225*1.0)+(45*50) = 5,040 persons/h
1
© 2019 Pearson Education, Inc., Hoboken, NJ. All rights reserved. This material is protected under all copyright laws as they currently
exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.
Page 4 TRAFFIC ENGINEERING Mc shane-SOLUTIONS MANUAL.pdf
