A sample presentation on spot speed study on the spot nearby biotechnology department IIT-KGP

1. GROUP- B
14CE10002-Aditya Parik
14CE10005-Amit Kumar
14CE10006-Amit Sahoo
14CE10007-Anukul Kumar
GATE NO 5 TO NEHRU MUSIUM

2. It is instantaneous speed of vehicle
• Spot speed data is the collection of
speed of all vehicle passing through
that particular location.

3. • Planning traffic control and regulation
• Geometric design
• Accident studies
• Traffic capacity
• Speed trends

4. • Working principle: Doppler’s effect
• The apparatus transmit high frequency
electromagnetic waves toward the
operating vehicle, reflected waves changes
their frequency depending upon the speed
of vehicle and returns back to radar gun by
reading this radar gun gives the speed of
that vehicle.

5. Average
speed
Grouped
Standard
deviation
Grouped
Variance
Confidence
interval
Non grouped
u = uj/N
Non grouped
Value of Z for :-
• 85th percentile = 1.44
• 95th Percentile = 1.96
• 95.5th Percentile = 2.00
• 99.7th Percentile = 3.00

6. Median speed 50th-percentile speed
Modal speed The speed value that occurs most frequently in a
sample of speeds
ith-percentile speed The spot speed below which i percent of the vehicles
travel, e.g. 85th-percentile speed
Pace The range of speed that has the greatest number of
observations; usually 10-mph range

7. Maps Details

8. • GATE NO 5 TO NEHRU MUSIUM
• Single lane road with both side footpath
• Connecting to AR, BT, CE, ME, CH, VGSOM, IS
&Nehru museum
• Main traffic is bicycle , bikes including some pc

9. • Speed breaker: 3
• No parking symbol:2
• No overtaking symbol:3
• No horn symbol : 1
• Speed limit: 6(25 kmph)
• Pedestrian: 3

10. • We draw the cumulative frequency vs
speed curve for the calculation of 85th
percentile speed.

11. Mean speed: 28.9 kmph
Standard deviation: 5.3 kmph
Confidence interval: 27.9-29.8 km
Median: 28.67 kmph
85th percentile: 34 kmph

12. Mean speed: 26.7 kmph
Standard deviation: 4.4 kmph
Confidence interval: 25.4-
27.9kmph
Median: 28 kmph
85th percentile:30 kmph

13. Mean speed:30.6 kmph
Standard deviation:6.7 kmph
Confidence interval: 29.0-32.1
kmph
Median: 29.16 kmph
85th percentile:37 kmph

14. Mean speed:24 kmph
Standard deviation:4.5 kmph
Confidence interval:21.3-29.6
kmph
Median:24 kmph
85th percentile: 29 kmph

15. Mean speed:23.5 kmph
Standard deviation:3.4 kmph
Confidence interval:22.1-24.8
kmph
Median: 22.6 kmph
85th percentile: 28 kmph

16. CIVIL DEPARTMENT
sl.no. time cars bikes cycles others(rickshaw & buses)
1 1:30pm- 1:45pm 8 17 81 2
2 1:45pm- 1:52pm 2 8 37 1
3 2:00pm- 2:15pm 10 38 101 4
4 2:15pm- 2:30pm 7 35 103 1
5 2:30pm- 2:45pm 5 18 45 2
6 2:45pm- 3:00pm 9 17 36 1
ARCHI DEPT
SL.NO TIME CARS BIKES CYCLES
OTHERS(RICKSHAW
+BUSES)
1 1:45pm- 2:00pm 29 48 73 1
2 2:00pm- 2:15pm 11 15 25 4
3 2:15pm- 2:30pm 4 11 14 0
4 2:30pm- 2:45pm 4 5 10 0
5 2:45pm- 3:00pm 2 6 23 0

17. 0
2
4
6
1:30pm-
1:45pm
1:45pm-
1:52pm
2:00pm-
2:15pm
2:15pm-
2:30pm
2:30pm-
2:45pm
2:45pm-
3:00pm
OTHERS(RICKSHAWS &
BUSES)
OTHERS(RICKSHAWS & BUSES)
0
20
40
60
80
100
120
CYCLES
CYCLES
0
10
20
30
40
BIKES
BIKES
0
5
10
15
CARS
CARS

18. 0
5
1:45pm-
2:00pm
2:00pm-
2:15pm
2:15pm-
2:30pm
2:30pm-
2:45pm
2:45pm-
3:00pm
OTHERS(RICKSHAW+BUS
ES)
OTHERS(RICKSHAW+BUSES)
0
20
40
60
1:45pm-
2:00pm
2:00pm-
2:15pm
2:15pm-
2:30pm
2:30pm-
2:45pm
2:45pm-
3:00pm
BIKES
BIKES
0
50
100
1:45pm-
2:00pm
2:00pm-
2:15pm
2:15pm-
2:30pm
2:30pm-
2:45pm
2:45pm-
3:00pm
CYCLES
CYCLES
0
10
20
30
40
1:45pm- 2:00pm2:00pm- 2:15pm2:15pm- 2:30pm2:30pm- 2:45pm2:45pm- 3:00pm
CARS
CARS

19. • As It can be observed from the plots, 85th
percentile speed is greater than speed limit of 25
kmph.
• The straight unobstructed road in front of
Biotechnology Department sees very high 85th
percentile speed (especially in Civil to AR
direction).
• Traffic is generally low during the daytime.
• Major vehicles plying this road are bicycles.

20. • Many of the vehicles do not follow the
speed limit.
• Since bicycles are the majority and also
slow, increasing speed limit is not safe.
• Speed breaker in front of civil department
is not effective enough in reducing the
speed to the speed limit in Civil to AR
direction.

21. • We can change the geometric design of speed
breakers for reducing the speed to the speed
limit.
• We can add one more speed breaker in front of
Biotechnology department entry gate.
• Concave mirror can be used in the turns to see
the incoming vehicles during the turning on the
slopes.