Course: TTE 4804/5805-Highway Geometric Design Homework No.: One Due Date: Thursday, January 13, 2011 Problem 1 Two tangents intersect at station 37+63.82 with a central angle, , of 1537'30" Rt. A 0230'00" circular curve connects the two tangents. (a) Dra

Course:
Homework No.:
Due Date:
TTE 4804/5805Highway Geometric Design
Four
Thursday, February 17, 2011
1. An existing simple horizontal curve is to have spirals added to the ends. The center portion of
the curve is to remain unshifted. The curve has the f

Course:
Homework No.:
Due Date:
TTE 4804/5805Highway Geometric Design
Three
Tuesday, February 8, 2011
1. A highway transportation agency is conducting a traffic count on an existing highway for the
purpose of determine the directional design volume. An au

Course: TTE 4804/5805-Highway Geometric Design Homework No.: Two Due Date: Tuesday, January 25, 2011 Problem #1 Given the following data for a vertical curve of a road: Gl = 2.5%, G2 = +5.5% and station of PVI = 250+50. At station 252+50, the vertical cur

3-80
A Policy on Geometric Design of Highways and Streets
at the 50-km/h [30-mph] design speed (see Figure 3-16) and 0.38 [0.38] percent break at the 120-km/h
[75 mph] design speed need. Where the traveled way is revolved about an edge, these grade breaks

Chapter 2Design Controls and Criteria
1.83 m
[6.0 ft]
6.10 m
[20.0 ft]
1.22 m
[4.0 ft]
9.14 m
[30.0 ft]
IW
0
0
10 ft
P
1m
Scale
Path of front
overhang
5
&7
[43. PPD[
3 ft]
Path of left
front wheel
0LQ
UDG WXUQ
LQ
LXV
J
P
>
P
n.
mi
m
4
8.6 .4 ft]
[28
I
IW

2-80
A Policy on Geometric Design of Highways and Streets
can reduce the time for the pedestrian walk phase, thereby increasing the time available for opposing
vehicular travel.
Walking speeds are faster at midblock locations than at intersections, are fa

3-110
A Policy on Geometric Design of Highways and Streets
for each, 2 m or 2 ft horizontally) cut slopes, the sight obstruction is approximately 5.75 m [19 ft] outside
the centerline of the inside lane. This is sufcient for adequate sight distance at 50

Chapter 3Elements of Design
90 m [300 ft] beyond the crest (i.e., 30 m [100 ft] plus 60 m [200 ft]), and an additional tapered section with
a desirable taper ratio of 50:1 that should be at least 180 m [600 ft] long.
A climbing lane should desirably be as

American Association of State Highway and Transportation Ofcials
444 North Capitol Street, NW, Suite 249
Washington, DC 20001
202-624-5800 phone/202-624-5806 fax
www.transportation.org
All rights reserved.
Duplication is a violation of applicable law.
Pub

3-54
A Policy on Geometric Design of Highways and Streets
Table 3-13a. Minimum Radii and Superelevaon for Low-Speed Urban Streets
Metric
Vd = 20 km/h
Vd = 30 km/h
Vd = 40 km/h
Vd = 50 km/h
Vd = 60 km/h
Vd = 70 km/h
e (%)
R (m)
R (m)
R (m)
R (m)
R (m)
R (m

Chapter 3Elements of Design
From the laws of mechanics, the basic equation that governs vehicle operation on a curve is:
Metric
U.S. Customary
(3-6)
where:
where:
e
= rate of roadway superelevation,
percent
e
= rate of roadway superelevation,
percent
f
=

2-46
A Policy on Geometric Design of Highways and Streets
Locations with potential for information overload should be identied and corrected. The adequacy of the
sight lines and sight distances should be assessed, and it should be determined whether unusu

Course:
Homework No.:
Due Date:
TTE 4804/5805Highway Geometric Design
Six
Tuesday, March 22, 2011
PROBLEM #1
A two-lane highway (two 12-ft lanes with negligible shoulders) has a posted speed limit of 60
MPH, and on one section, has both horizontal and ver

Course:
Homework No.:
Due Date:
TTE 4804/5805Highway Geometric Design
Five
Thursday, March 3, 2011
1.
A vertical curve on a 70 mph roadway is to connect two grades of +2.4% and -3.3%.
(a) Determine the minimum length of a vertical curve needed to satisfy

SOLUTIONS TO HOMEWORK #8
PROBLEM #1
There is no unique solution to this problem. The grading criteria that should be used include:
a) The improvement drawing should have been drawn to scale showing the dimensions o all
of
important elements such as lane w

Course:
Date:
Task:
TTE 4804/5805Highway Geometric Design
Tuesday, January 18, 2011
Quiz #1
Instructions
This is a 15-minute closed-book, closed-notes quiz. Answer all problems in the space provided.
A surveyor has determined that the intersection angle f

so LUT JO f\JS
TTE 4804 Quiz #2 Solutions
Q UIZ #:
2
PROBLEM.l
Speed distribution on a section of a rural two-lane highway shows that the average speed is 47.5
mph and the ss" percentile speed is 53.8 mph. A consulting engineer wishes to design a
roadway

Course: TTE 4804/5805Highway Geometric Design
Date:
Thursday, March 3, 2011
Task:
Quiz #3
Name: _
Instructions
This is a 15-minutes closed-book, closed-notes quiz. Please present your work neatly and
legibly.
PROBLEM
A two-lane highway (two 12-ft lanes wi

Course:
Date:
Task:
TTE 4804/5805Highway Geometric Design
Thursday, March 24, 2011
Quiz #4
Instructions
This is a 15-minutes closed-book, closed-notes quiz. Please present your work clearly.
PROBLEM #1
The following are notes for cross sections at Sta. 10