FCE 346: TRANSPORTATION ENGINEERING I
TUTORIALQ1:
a) Traffic growth may be grouped into Normal, Diverted and Generated/Induced traffic.
Discuss and show how the three traffic categories relate with the future design traffic or
‘Traffic Projection Factor’.
b) The Kilifi County Government requires the Mokowe-Hindi (C112) Road to be upgraded
to improve on regional mobility. A traffic volume count on the road shows Annual
Average Daily Traffic (AADT) of 5000 vpd in 2021. The proposed improvement will cater
for a 20-year medium-term planning horizon up to 2041. Additional studies established
that normal traffic growth may be taken as 50 per cent of the current traffic and diverted
traffic may be taken as 30 per cent.
Calculate the Traffic Projection Factor if an increase of l000 vehicles per day is expected
due to development; and also determine the AADT in 2033.
TUTORIAL Q2:
Government Policy is required to implement Long-term Strategic Plans. For Instance, Kenya
developed the SESSIONAL PAPER OF 2006 ON “THE DEVELOPMENT AND
MANAGEMENT OF THE ROADS SUB-SECTOR FOR SUSTAINABLE ECONOMIC
GROWTH” which addressed gave policy direction to “implement a complete and immediate
restructuring of the roads sub-sector”.
Discuss the following items meant to support the government’s strategic objectives.
i) State and briefly explain the key elements of a road transport system to be
considered in National Transport Policy
ii) State and explain the REAL objectives of transportation planning that should guide
the development of transport policy
iii) What typical transport plans that should be prepared in a Transport Master Plan in
line with the government’s policy direction?
TUTORIAL Q3 (Traffic Surveys: Theory & Practice on the Moving Observer Method)
(a) Theory:
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(b) EXAMPLE: ABCD is a north-south street having 3 adjacent sections as shown in Table
1. Tables 2 gives results of average of test runs by the moving observer team:
Table 1
Section
Length(m)
Intersections
A-B
500
B
B-C
600
C
C-D
450
Table 2 Observations
Southbound
Section
A-B
B
B-C
C
C-D
Time
taken
(sec.)
Vehicles
met
152
16
172
10
138
25
31
28
Northbound
Vehicles in same
direction
overtaking
overtaken
4
2
3
3
2
4
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Time
taken
(sec.)
Vehicles
met
Vehicles in same
direction
overtaking
overtaken
145
18
160
12
132
45
55
50
1
3
2
1
4
1
Calculate the flows and running speeds in each section in both directions and the
overall journey speeds in each direction.
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GPKM/
27 April 2022
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