Spot speed study

SPOT SPEED ANALYSISGROUP- B 14CE10002-Aditya Parik14CE10005-Amit Kumar14CE10006-Amit Sahoo14CE10007-Anukul Kumar

GATE NO 5 TO NEHRU MUSIUM

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

Purpose of spot speed study • Planning traffic control and regulation • Geometric design• Accident studies • Traffic capacity • Speed trends

RADAR GUN

• 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.

SPEED STATICS Average speed

Grouped

Standard deviation

Grouped

Variance

Confidenceinterval

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

Types of speed measurement

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

Maps Details

Road details

• 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

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

Cumulative frequency distribution curve

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

Mean speed: 28.9 kmphStandard deviation: 5.3 kmphConfidence interval: 27.9-29.8 kmphMedian: 28.67 kmph 85th percentile: 34 kmph

Mean speed: 26.7 kmphStandard deviation: 4.4 kmph Confidence interval: 25.4-27.9kmph Median: 28 kmph85th percentile:30 kmph

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

Mean speed:24 kmphStandard deviation:4.5 kmph Confidence interval:21.3-29.6 kmph Median:24 kmph85th percentile: 29 kmph

Mean speed:23.5 kmphStandard deviation:3.4 kmphConfidence interval:22.1-24.8 kmph Median: 22.6 kmph85th percentile: 28 kmph

CIVIL DEPARTMENTsl.no. time cars bikes cycles others(rickshaw & buses)

11:30pm- 1:45pm 8 17 81 2

21:45pm- 1:52pm 2 8 37 1

32:00pm- 2:15pm 10 38 101 4

42:15pm- 2:30pm 7 35 103 1

52:30pm- 2:45pm 5 18 45 2

62:45pm- 3:00pm 9 17 36 1

ARCHI DEPT

SL.NO TIME CARS BIKES CYCLESOTHERS(RICKSHAW+BUSES)

1 1:45pm- 2:00pm 29 48 73 12 2:00pm- 2:15pm 11 15 25 43 2:15pm- 2:30pm 4 11 14 04 2:30pm- 2:45pm 4 5 10 05 2:45pm- 3:00pm 2 6 23 0

1:30p

m- 1:45

pm

1:45pm

- 1:52p

m

2:00pm

- 2:15p

m

2:15p

m- 2:30

pm

2:30pm

- 2:45p

m

2:45p

m- 3:00

pm03

OTHERS(RICKSHAWS & BUSES)

OTHERS(RICKSHAWS & BUSES)1:3

0pm- 1

:45pm

1:45pm

- 1:52p

m

2:00p

m- 2:15

pm

2:15pm

- 2:30

pm

2:30pm

- 2:45p

m

2:45pm

- 3:00p

m0

4080

120CYCLES

CYCLES

1:30pm

- 1:45p

m

1:45p

m- 1:52

pm

2:00pm

- 2:15p

m

2:15p

m- 2:30

pm

2:30pm

- 2:45p

m

2:45pm

- 3:00p

m0

2040

BIKES

BIKES1:3

0pm- 1

:45pm

1:45pm

- 1:52p

m

2:00pm

- 2:15p

m

2:15pm

- 2:30p

m

2:30pm

- 2:45p

m

2:45pm

- 3:00

pm06

12CARS

CARS

1:45pm-

2:00pm

2:00pm-

2:15pm

2:15pm-

2:30pm

2:30pm-

2:45pm

2:45pm-

3:00pm

0246

OTHERS(RICKSHAW+BUSES)

OTHERS(RICKSHAW+BUSES)1:45pm- 2:00pm

2:00pm- 2:15pm

2:15pm- 2:30pm

2:30pm- 2:45pm

2:45pm- 3:00pm

0

20

40

60BIKES

BIKES

1:45pm

- 2:00p

m

2:00pm

- 2:15p

m

2:15pm

- 2:30p

m

2:30pm

- 2:45p

m

2:45pm

- 3:00p

m0

4080

CYCLES

CYCLES1:45p

m- 2:00

pm

2:00pm

- 2:15p

m

2:15pm

- 2:30p

m

2:30p

m- 2:45

pm

2:45p

m- 3:00

pm0

2040

CARS

CARS

Observation• 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.

Conclusions• 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.

Recommendations• 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.

THANK YOU