This document summarizes a study analyzing traffic speed data on a road outside NICMAR Gate no. 1 in India. A team of 4 students conducted a spot speed study using enoscopes to record the time taken for vehicles to travel a 50m stretch of the road. They collected over 70 time readings and calculated the speeds. Most vehicles traveled between 30-40 km/h. The results were analyzed to determine the speed distribution and limits. This will help determine the design speed for checking geometric elements of the highway.

1. Speed AnAlySiS of
trAffic dAtA
preSented by :
AnShAl VyAS -f31040
AtindrA VyAS-f31041
Arjun rAjAn KAul-f31020
neerAj - f31013

2. title of Study
Speed Analysis of
traffic Data using
Spot speed Study

3. objectiVe
• To Determine the Upper & Lower Values or
speed limit regulation of mixed traffic flow
• To Determine the Design speed for checking
the geometric Design Elements of the highway

4. Scope

5. Study AreA
• Our Study Area was the road outside NICMAR Gate no: 1
• This road has quite a number of small shops on one side
and is located close to MITCON university as well.
• We feel this road was best suited to conduct our analysis
as this is used quite frequently and would provide us
with a lot of readings that will help improve our accuracy
of our outcome

6. GEOMETRICAL
DIMENSIONS OF THE ROAD
Length – 50m
Width – 19m
Carriage way- 3.75m
No shoulders provided.

7. PROCEDURE
• Two reference points were taken and measuring
tape was used to measure the distance between the
points.
• Chalk was used to mark the two points. The two
observers were stationed at these points.
• An observer stood at the reference point where the
enoscope was fixed. Every time the image of a
passing vehicle is seen through the enoscope, the
stop watch is started.

8. •The second observer would then stop the stopwatch whenever he observed the same vehicle pass
the second reference point.
•The distance apart and the time taken for each
vehicle to cover the distance were used to calculate
the speed of each vehicle

9. StatiStiCal
MEthOD(EQUiPMENt USED)
ENOSCOPE:
• This device, also known as the Mirror-box, is an L-shaped box,
open at both ends, with a mirror set at a 45-degree angle to
the arms of the instrument.
• The instrument bends the line of sight of the observer so that
it is perpendicular to the path of the vehicle.
• The stop-watch is started as soon as the vehicle passes the
first reference point and is stopped as soon as it passes the
observer.
• The method can be used with one enoscope or with two
enoscopes.

10. Data COllECtED
(RECORDED tiME Of tRavEl iN SECS)
3.4
3.29
3.76
3.51
3.59
2.69
1.76
4.59
2.5
4.45
5.85
3.39
2.94
3.63
3.65
2.8
2.2
4.36
4.42
1.9
3.37
3.11
3.18
4.66
3.1
3.18
4.66
3.1
2.23
2.6
3.51
4.16
2.66
4.43
3.92
3.23
2.1
3.05
2.68
3.32
3.69
3
3.06
2.98
3.64
4.1
2.8
2.86
3.18
2.49
2.8
2.86
3.18
2.49
2.8
2.4
3.4
4.1
2.6
2.97
3.3
3.5
3.29
3.78
4.04
4.8
2.93
7.31
3.8
3.68
3.13
3
7.79
4.4
2.8
1.65

11. Methodology
• This is an account of how the speed study was
carried out.
• Location: Stretch of road in front of NICMAR gate
no.1.
• Number of individuals involved : Two(5)
• Period of study: between 11:30 a.m. and 12:30 p.m.
on a weekday .
• Instruments used: Stop-watch, measuring tape,
marker chalk, data sheet/book.

12. AnAlysis
Time Taken By
Vehicle(seconds)
Con3.39version factor
(multiply with 18/5)
Speed of the
vehicle(km/hr)
3.4
3.6
31.6
3.29
3.6
32.8
3.76
3.6
28.72
3.51
3.6
30.76
3.59
3.6
30.08
2.69
3.6
40.14
1.76
3.6
61.36
4.59
3.6
23.52
2.50
3.6
43.20
4.45
3.6
24.26
5.85
3.6
18.58

13. 3.39
3.6
31.85
2.94
3.6
36.73
3.63
3.6
21.75
3.56
3.6
30.33
2.80
3.6
36.57
2.20
3.6
29.75
4.36
3.6
24.77
4.42
3.6
24.43
1.90
3.6
56.84
3.37
3.6
32.04
3.11
3.6
34.72
3.18
3.6
33.96
4.66
3.6
23.17
3.10
3.6
32.83
2.23
3.6
48.43

14. 2.60
3.6
41.5
3.51
3.6
30.76
4.16
3.6
26.9
2.66
3.6
40.6
4.43
3.6
24.37
3.92
3.6
27.55
3.23
3.6
33.92
2.10
3.6
51.4
3.05
3.6
35.4
2.68
3.6
40.29
3.36
3.6
32.53
3.69
3.6
29.5
3.00
3.6
36.0
3.06
3.6
36.0
2.98
3.6
36.24

15. 3.64
3.6
29.6
4.10
3.6
26.34
2.80
3.6
38.50
2.86
3.6
37.97
3.18
3.6
33.96
2.49
3.6
43.37
2.80
3.6
38.57
2.40
3.6
45.00
3.40
3.6
31.76
4.10
3.6
26.34
2.60
3.6
41.53
2.97
3.6
36.30
3.30
3.6
32.7
3.50
3.6
30.85
3.29
3.6
32.82

16. 3.78
3.6
28.57
4.04
3.6
26.73
4.80
3.6
22.50
2.93
3.6
36.86
7.31
3.6
14.77
3.80
3.6
28.42
3.68
3.6
29.34
3.13
3.6
34.50
3.00
3.6
36.00
7.79
3.6
13.86
4.40
3.6
24.54
2.80
3.6
38.57
1.65
3.6
66.25

17. Result
(FRequency distRibution oF spot
speed data)
Speed
Range(kmph)
Mid Speed
(kmph)
Frequency , F
Frequency
percentage
Cumulative
Frequency
0-10
5
0
0
0
10-20
15
03
4.43
4.43
20-30
25
20
28.98
33.41
30-40
35
32
46.37
79.78
40-50
45
10
14.49
94.27
50-60
55
02
2.89
97.16
60-70
65
02
2.89
100

18. FRequency distRibution cuRve oF
the spot speeds

19. cumulative speed distRibution

20. ReFeRences
• Highway Engineering –S.K Khanna
• Class Notes