This document summarizes a traffic volume study conducted at the intersection of Russell Square and Panthapath in Dhaka, Bangladesh. The study involved manual counting of vehicle types over short durations to determine vehicle composition, directional distribution, and flow rates throughout the day. Key findings included light vehicles comprising the majority of traffic at 49%, an average daily traffic volume of 2375 vehicles, and a peak flow rate of 2456 passenger car units per day. Flow fluctuation patterns showed non-uniform traffic volumes throughout the day rather than a single peak period. The study aims to provide data to inform transportation planning, design, and management decisions.

1. TRAFFIC VOLUME STUDY
Ahmed Ferdous
1004137
Department of civil engineering
Bangladesh University of Engineering and Technology

2. Traffic volume studies
Traffic volume study means determining the number,
movement and Classification of Roadway vehicle at a given
location or point of traffic stream. So it is defined as the
procedure to determine mainly volume of traffic moving on
the roads at a particular section during a particular time.

3.  Determining vehicle composition of traffic stream
 Determining service flow rate
 Determining directional distribution
 Peak hour flow
 Estimating average annual daily traffic AADT based
on expansion factors
 Drawing flow-fluctuation curve
OBJECTIVES:

4. IMPLICATION:
IMPLICATION
Design
Planning
Improving
Dynamic
Traffic
Manage
ment
Estimating
Use
Computing
Accident
Rates
Traffic
Stream

5. Methodology:
Traffic
volume
study
Automatic
Counting
Method
Manual
Counting
Method
Contact
system based
Contactless
system based
Direct method
Indirect method

6. Manual method:
• Can be readily used
• Easy classifying and
proportioning
• Erroneous for long term
period and high volume
Automatic method:
• Long duration suitability
• Permanent station
• Online data processing
• Erroneous in non lane
based traffic
• High initial cost
• Problem in classifying

7. SHORT DURATION COUNT:
MAINTENANCE,IMPROVEMENT
LONG DURATION COUNT:
PLANNING,DESIGN

8. APPROACH:
• RUSSEL SQUARE TO PANTHAPATH INTERSECTION
• GROUPED NUMERATORS
• MANUAL COUNTING:
Hand Counter, Tally Sheet, Clip
board
• Short count of fifteen minutes

9. Data collection

10. • DATA ANALYSIS:
MOST IMPORTANT PHENOMENA-VEHIVLE COMPOSITION
Bus (B)
2%
Truck (T)
0%
Light Vehicle
(LV)
49%
Auto
Rickshaw
(AR)
11%
Small Public-
transport
(SP)
10%
Motor
Cycle
(MC)
10%
NMV
20%
VECHILE COMPOSITION(%)
• PREDOMINATE TYPE IS
LIGHT VEHICLE
• HEAVY VEHICLE IS RARE
• NMV COMPOSITION IS
PRETTY HIGH FOR THIS
TYPE OF ROAD

11. 0
50
100
150
200
250
300
350
400
grou
p 5
grou
p 4
nmv 34.4 26.4
motor cycle 16 9.6
small public transport 72 16.2
Auto rickshaw 32.2 25.2
light vehicle 205 169
truck 4 0
bus 2 2
PCU
Directional distribution(pcu)
• FOR RUSSEL SQUARE TO PANTHAPATH ROAD
DISTRIBUTION FACTOR IS .6 AND .4 FOR
OPPOSITE
• FOR DIFFERENT TYPES THIS RATIO VARIES
FROM .45 TO.6
• FOR PREDOMINATE TYPE VEHICLE THIS RATIO IS
NEARLY .5

12. -50
0
50
100
150
200
250
300
350
400
450
500
0 10 20 30 40 50
bus truck L.V cng+Sheet4!$F$2 spt m.bike
9.45 10 10.15 10.30 11 11.30
P
C
U
Time variation:
• MAINLY LV CHANGES
WITH TIME
• SMALL PUBLIC
TRANSPORT GET
INCREASED AFTER
FIXED PERIOD

13. ADT : The equivalent hourly traffic flow measured in less than
one hour
GROUP Flow rate EXP. FAC 7day volume ADT
1 1563.2 7.012 10961.16 1565.88
2 856.8 7.012 6007.882 858.2688
3 1430 7.012 10027.16 1432.451
4 993.6 7.012 6967.123 995.3033
5 1462.4 7.012 10254.35 1464.907
6 1064.8 7.012 7466.378 1066.625
7 1023.2 7.012 7174.678 1024.954
8 1610 7.012 11289.32 1612.76
ON AVERAGE 1100 PCU
IN EACH DIRECTION

14. • AADT: Total yearly volume divided by number of days
Exp.FAC AADT 1 DIRECTION AADT 2 DIREC Average
2375
0.948 1484.454
0.948 813.6388 3013.29
0.948 1357.964 1785.2
0.948 943.5475 2369
0.948 1388.732 2332.2
0.948 1011.161
0.948 971.6564
0.948 1528.896
AADT ON AVERAGE 2375
FLOW RATE
2456PCU/DAY
Panthopath to rassel
square
Rassel square to
panthopath
total
total pcu 248.4 365.6 614
elapsed time 15 15 15
Flow
rate(pcu/day)
993.6 1462.4 2456

15. FLOW FLUCTUATION:
0
100
200
300
400
500
600
700
800
900
0 10 20 30 40 50
GR 5
GR 4
COMBINED
P
C
U
AXIS SHOWS TIME LAG
DATA @ 9.30,10,10.30,11,11.30 AM
• NOW HEARTBIT PEAK
LIKE URBAN TRAFFIC
PATTERN
• TREND IS NOT SAME
FOR BOTH DIRECTION

16. SUMMARY:
• Percentage of light vehicle is high
• ADT AND AADT IS 1100 & 2375
• FLOW RATE IS 2456 PCU/DAY
• DIRECTIONAL DISTRIBUTION .6: .4
• FLOW FLUCTUATION IS PRESENT

17. RECOMMANDATION:
• RUN A SHORT TERM TEST SURVEY
• USE 1ST FLOOR FOR BETTER VIEW
• IMPLY MORE MANPOWER FOR LIGHT VEHICLE COUNT

18. QUESTION?
THANK YOU 