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Sri Lanka Institute of Information Technology
B. Sc.,Eng. Honours Degree
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In
;- Engineering
End-term Examination
Year 4, Semester I (2016)
CE4411 - Traffic Engineering and Planning
Duration: 2 Hours
July 2016
Instructions to Candidates:
This paper has 9 pages including the cover page.
Answer All Questions.
Write answers on the question paper.
Questions do not carry equal marks.
Total mark attainable is 100.
This is an open-note exam.
Mobile phones are not permitted. Only electronic equipment
allowed is a calculator approved by the Faculty of Engineering.
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1. Determine the share (proportion) of person-trips by each of two modes (Private Auto and
Public Transportation) using the multinomiallogit model with utility function shown in
Equation Q 1 and given the information in Table Q 1.
(10 marks)
UK= Ak- O.OSTa- 0.04Tw- 0.03Tr- 0.014C
(Equation Q 1)
Table Q 1: Data to determine mode share
Parameter
Private Auto Public Transport
5
10
Ta=access time(min)
15
Tw=waiting time (min)
0
25
Tr=riding time (m.in)
40
C= out-of-pocket cost (Rs)
150
100
-0.01
-0.07
Ak=Calibration constant
2. Assign the vehicle trips shown in the 0-D·trip matrix at Table Q2 to the network shown in
Figure Q2 using the ali-or-nothing assignment technique. Determine the minimum time
paths from Node 1 to all other zones and volume assigned to each. Calculate the total
vehicle minutes of travel from Node-1 to all other zones.
(10 marks)
Fromffo
1
2
3
4
5
1
0
410
205
260
210
Table Q2: Trips between Zones
2
3
4
110
130
250
0
170
100
120
0
100
160
70
0
120
350
350
2
5
115
150
150
400
0
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Figure Q2 Highway Network
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3. In conducting accident analysis, the number ofEPDO (Equivalent Property Damage Only)
crashes is often used instead of total number of crashes. What are advantages of doing this?
(5 marks)
4. An agency has selected 30 signalized intersections for conducting an accident study. Mean
number of crashes by considering all these sites is I 0 and the standard ..deviation is 2.9 for
the last year. For the same year, mean rate per MEV and the corresponding standard
deviation of the crash rate are 1.03 and o.33 respectively, for the same 30 intersections.
Table Q4 shows the detaiis of 6 intersections that are included in these 30 sites. Determine
the intersections which , could be identified as critical for further investigation by
considering all possibilities of both these methods. (Use 95% level of confidence
(a) Classic Statistical Method
(b) Rate Quality Control Method
(25 marks)
Table Q4 Details of Six Intersections
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Intersection Crashes
A
B
c
D
E
F
12
8
15
22
7
13
Entering
Volume/day
50,000
30,000
25,000
62,000
45,000
26,500
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5. Explain the purposes and advantages of conducting traffic conflict studies. Also, what are
the disadvantages and concerns associated with conflict studies?
( 10 marks)
6. How do you define quantitative measures to characterize traffic operatjonal conditions?
Your answer should specify the measures for freeway sections, weaving sections, urban
streets, signalized inte~ections, unsignalized intersections, highway sections, etc..
separately.
(10 marks)
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7. What are the purposes to conducting following?
a. Road Safety Audit
(5 marks)
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b. Traffic Impact Analysis
(5 marks)
8. Write procedure to conduct following traffic studies. Be specific and write only important
steps.
a. Pedestrian level-of-service in Malabe-Kaduwela Road
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( 5 marks)
b. Study the travel behavior characteristics of the SUIT students
( 5 marks)
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c. Study the performance ofHokandara (4-way unsignalized) intersection
( 5 marks)
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d. Traffic Impact Study for proposed 8-story Engineering faculty building at SLUT,
Malabe
( 5 marks)
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End of the Question Paper
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