Traffic speed analysis presentation- ahmed ferdous-1004137 buet Please remind this is not a unique effort..My Classmates and specially Ahasanullah Un iversity Students were a major help...We have tried DATA ANALYSIS part to be a solo doing ..But other parts are nearly copy past from net especially from AUST ian...Hope you can do the whole on your own.....

1. Traffic speed study
Ahmed Ferdous
1004137
Department of civil engineering
Bangladesh University of Engineering and Technology

2. Objective
• Determine weighted average speed, Pace, modal speed, speed
limits, design speed
• Check the speed distribution pattern
• Finding Time-mean speed and Space-mean speeds
• Finding delay for each type of vehicle
• Finding the cost of delay
• Find LOS of study road

3. IMPLICATION
• Capacity studies
• Geometric studies
• Accident analysis
• Economic studies
• Performance studies
• Planning and designing of
1. Traffic signal design
2. Road sign design
3. Parking crossing design
4. Establishing speed limit
5. Speed zoning
6. Placing control device

4. Methodology
SPOT SPEED:
1.Manual
2.Automatic:
a. RADAR meter
b.Pressure strip
c.Video
d.Graph
Travel speed:
a.License plate method
b.Floating car method
c.Elevated observer method

5. OUR APPROACH
SPOT SPEED : MANUAL
odometer , stopwatch
Checking with radar gun
Grouped numerators
Travel speed :
License plate method
Mobile phone , recording app,stopwatch

6. Data collection:

7. Data Analysis:
Flow Histogram:
0
5
10
15
20
25
30
35
40
45
5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00
%frequency
spot speed,mph
%frequency vs speed histogram
Series1
• maximum vehicle
varies speed
between 15-20
mph.About 40%.
• Velocity less than
10mph is very rare.
• Very few vehicle are
within speed greater
than 35mph

8. Frequency Curve:
-5
0
5
10
15
20
25
30
35
40
45
50
0 10 20 30 40
%frequency
spot speed,mph
• Modal speed 16 mph for this
road and traffic condition.
• Pace is in between 9mph and
24mph.
• As the curve is nearly
symmetric, so Median speed is
also 16mph

9. Average speed:
speed mid speed frequency %frequency v total
0 to 5 2.5 0 0 0
5 to 10 7.5 1 0.653595 7.5
10 to 15 12.5 58 37.9085 725
15 to 20 17.5 61 39.86928 1067.5
20 to 25 22.5 22 14.37908 495
25 to 30 27.5 6 3.921569 165
30 to 35 32.5 5 3.267974 162.5
35 to 40 37.5 1 0.653595 37.5
154 100 total 2660
Vehicle are
running at a
speed of
17.27mph

10. Cumulative frequency distribution:
0
20
40
60
80
100
120
0 5 10 15 20 25 30 35 40
AxisTitle
Axis Title
95%
85%
50%
15%
 Our design speed to be
32.5mph
 Median speed is 16 mph.Look
it has satisfied the previous
%frequency vs speed curve
 Safe speed is 19mph
 Speed limit is 9mph to 19
mph

11. Travel Speed :
Vehicle
Type
Vehicle No Duration
(Seconds)
Speed
(m/s)
Average Duration
(Seconds), dT1
Car 1 140 7.14286
160.80
2 155 6.45161
3 150 6.66667
4 183 5.46448
5 176 5.68182
Bus 1 251 3.98406
241.75
2 228 4.38596
3 262 3.81679
4 226 4.42478
CNG 1 217 4.60829
215.50
2 245 4.08163
3 197 5.07614
4 203 4.92611
Motorcyc
le
1 318 3.14465
289.20
2 223 4.4843
3 329 3.03951
4 297 3.367
5 279 3.58423
Travel Time
On average
• Time mean speed 4.5
min
• Space mean speed
2.5sec

12. 0
1
2
3
4
5
6
1
time mean speed and space
mean speed
time mean space mean
duratio
n
speed time mean
speed
space mean (ʋi-
ʋt)^2
sd space
mean+sd62/space
mean
179 4.469274 4.829396 2.556784 0.129688 5.787736 3.9987
110 7.272727 52.89256
105 7.619048 58.04989
106 7.54717 56.95977
150 5.333333 28.44444
285 2.807018 7.879347
98 8.163265 66.6389
94 8.510638 72.43096
109 7.33945 53.86752
50 16 256
130 6.153846 37.86982
135 5.925926 35.1166
1019 0.785083 0.616356
137 5.839416 34.09878
144 5.555556 30.8642
144 5.555556 30.8642
158 5.063291 25.63692
153 5.228758 27.33991
247 3.238866 10.49026
215 3.72093 13.84532
The war drop relationship is
established

13. Delay cost:
no del
ay
total
delay
,min
vo
c
fac
or
occupa
ncy
fact
vot
fact
or
cost
1
passen
ger
cost
2
total
lv 40
01
60.
8
67.5724
4
10
0
2.1 20 6757.
244
8402.1 1680
42
17479
9.2
ar 91
7
40.
5
10.3162
5
25 2.1 5 257.9
063
1925.7 9628
.5
9886.
406
sp 83
3
40.
4
9.34811
1
45 10 6 420.6
65
8330 4998
0
50400
.67
tru
ck
83 95 2.19027
8
17
6
0 0 385.4
889
0 0 385.4
889
bu
s
16
6
91.
75
4.23069
4
11
0
40 5.5
2
465.3
764
6640 3665
2.8
37118
.18
bik
e
83
3
10
9.2
25.2676
7
5 1 12 126.3
383
833 9996 10122
.34
So we can see per hour
cost of in total is about
282712 BDT
Most loss is done for
light vehicle passengers

14. Distribution pattern:
Value of chi square is 29.9

15. LEVEL OF SERVICE:
DATA shows it to be F
But
• Visual seems to be los C
• This is due to that we
assumed to be lane wise and
motorized vehicle which is
not the real situation
LEVEL OF SERVICE:
DATA shows it to be F

16. RECOMMANDATION:
For improvement
• We have found speed to be
decreased due to loss of width
which is the result of
unauthorized parking. So
improvement can be done
here.
• Service road within or
controlled entrance from
nearby estates has to be done
For Study:
• If speed gun and
wireless talking
device(travel speed)
were used more
frequently more
reliable data could be
gained. Some group
used it un evenly. If
equitable use were
done data would be
more correct
• A test survey should be
conducted first

17. SUMMARY
:
• maximum vehicle varies speed between 15-20 mph.About 40%.
• Again volume study showed about 50% vehicle was light vehicle.So a
summary can be taken as light vehicle are running at a speed near 20
mph in that section
• Modal speed 16 mph for this road and traffic condition.That is most car
want to maintain 16mph while operating
• Pace is in between 9mph and 24mph.That is most driver are seen with 15
mph difference , to be in between these speeds
• As the curve is nearly symettric,so Median speed is also 16mph
• Our design speed to be 32.5mph
• Median speed is 16 mph.Look it has satisfied the previous %ferquency vs
speed curve
• Safe speed is 19mph
• Speed limit is 9mph to 19 mph
• Space mean speed is 2.5mph and time mean is 4mph
• Visual seems to be los C
T

18. Question?
THANK YOU