signal timing design example problems. intersection of michigan avenue and hewitt road

Signal Timing Design

Example Problems

N

Figure 3. Condition Diagram of the Michigan Avenue and Hewitt Road Intersection

ONLY

ONLY

ONLY

ONLY

Speed L

imit

45 MPH

MIC

HIGAN A

VENUE

383’

12’

12’

12’

12’

12’

15’

80’

100’

ONLY

Proposed Development Site(Vacant Land)

Vacant Land

Standard F

eder

al

Bank

Family Services &Learning Center

To I-94Freeway

Left Turn Signal

Speedway G

asolin

e

Station

Speedway G

asolin

e

Station

12’ 12’ 10’ 12’ 12’

60’

72’

30’

54’

48’

ONLY

ONLY

ONLY

ONLY

SCHOOL

Speed Limit

45 MPH

Left Turn Only

Case SignLeft Turn Only

Case Sign

HE

WIT

T R

OA

D

12’ 10’10’

ONLY

ONLYONLY

Left Turn Only

Case SignLeft Turn Only

Case Sign

180’

310’

220’

Proposed

Northern

Driveway

Proposed

Southern

Driveway

SCHOOL

Speed L

imit

45 M

PH

12’

12’

12’

12’

10’

ONLY

ONLY

64’

125’

Rich G

asoli

ne

Statio

n

Rich G

asoli

ne

Statio

n

Left Turn Signal

Intersection of Michigan Avenue and

Hewitt Road

N

Proposed Tim Horton’s/

Wendy’s Restaurant

(Two Driveways Proposed)







HEWIT

T ROAD

ELLSWORTH ROAD

309+15=324

103120

679+16=695

274+15=289

289

7

56

220

192+14= 206

98

46+31=77

38+44=82 17+9=26

35490

1102

36361+41=102

31321

4+9=13

320+9=329

345

404+9=413

187

Approach Volume = 547 vph(Vehicles per Hour)

Approach Volume= 352 vph










Total Intersection Volume= 2,445 vph



Figure 18. Future AM Peak Hour Traffic Volumes at the Three Study Intersections(Includes Existing Traffic Plus 5% Growth Plus Newly Generated Traffic due to the Proposed Development)

2+29=31

155

2

4

38

143

Newly Generated Traffic due to the Proposed Tim Hortons/Wendy’s Restaurant Only

LEGEND


LEGEND

N










HEWIT

T ROAD

ELLSWORTH ROAD

309+15=324

103120

679+16=695

274+15=289

289

7

56

220

192+14= 206

98

46+31=77

38+44=82 17+9=26

35490

1102

36361+41=102

31321

4+9=13

320+9=329

345

404+9=413

187
















2+29=31

155

2

4

38

143


LEGEND


LEGEND

N

N

10’

10’

12’

10’ON

LY

ON

LY

SCHOOL

10’5’

ONLY

ONLY

ONLY

ONLY

10’ 10’ 10’ 10’12’

10’5’

110’

15’

ONLY

ONLY

ONLY

ONLY

ON

LY

ON

LY

ON

LY

ON

LY

ON

LY

ON

LY

10’

10’

10’

10’

12’

140’40’ 5’10’5’

5’10’

105’

230’

HE

WIT

T R

OA

D

7-11 Convenience Store

School(8AM – 9AM, 3PM – 4PM)

Speed Limit 30 MPH

Speed Limit 45 MPH

Vacant Land

ELLSWORTH ROAD

Speed Limit 45 MPH

Residential AreaShopping Mall

N

Figure 5. Condition Diagram of the Hewitt Road and Ellsworth Road Intersection

Left Turn Signal (LT)

LT

LT

LT

N

HE

WIT

T R

OA

D










MIC

HIG

AN

AV

ENU

E

HE

WIT

T R

OA

D

ELLSWORTH ROAD

309+15=324

103120

679+16=695

274+15=289

289

7

56

220

192+14= 206

98

46+31=77

38+44=82 17+9=26

35490

1102

36361+41=102

31321

4+9=13

320+9=329

345

404+9=413

187
















2+29=31

155

2

4

38

143


LEGEND


LEGEND

N

N

SOLUTIONS

Michigan and Hewitt

NortheastboundMichigan Avenue

SouthwestboundMichigan Avenue

North-SouthHewitt Road

Assume the following phasing plan.

Assume the through and left-turn lane at the NE Bound approach is used as an exclusive left-turn lane during the peak hour.

Assume Saturation flow (S):

SThru = 1800 vphgpl, SLeft = 1200 vphgpl

YNE(split phase) = Max [1102/(1200*2), 363/1800, 102/1800]

= 0.46 0.20 0.06

YNE = 0.46

Michigan and Hewitt

Cycle Length Calculation

YSW(split phase) = Max [13/1200), (313+21)/(1800*2)]

= 0.01 0.09

YSW = 0.09

YNS(thru and permitted left turn phase)

= Max [82/1200, (77+26)/1800, 35/1200, (490+31)/(1800*2)]

= Max [0.07, 0.06, 0.03, 0.14]

YNS = 0.14Left turn-lane critical volumes were considered in YNS (although permitted), since there is not an exclusive left-turn phase for both directions

1.5L + 5

1 - yi

L = sum of lost time per phase

# Phases = 3

L = 2(3) = 6 sec

yi = 0.46 + 0.09 + 0.14 = 0.69

1.5*6 + 5

1 – 0.69

Assume C = 60 sec.


C =

C = = 14/0.31 = 45 sec

Assume 85th Percentile Speed on Michigan and Hewitt is approximately 45 mph = 66 fps

v

Y = t + 2(a+gG) = 1 + 66/20 = 4.3 sec

Assume width to clear Michigan Avenue = 100 ft

Assume width to clear Hewitt Avenue = 100 ft

AR = (W + L)/v

AR = (100+20)/66 = 1.8 sec

Clearance Interval per phase = 4.3 sec + 1.8 sec = 6.1 sec

Total Clearance Time = (6.1 sec) ( 3 phases) = 18.3 sec

Net Green time = cycle length – total clearance time

= 60 – 18.3 = 41.7 sec

Clearance Interval Design

Calculation of Splits

NE Bound Michigan = 41.7(0.46/0.69) = 27.8 sec

SW Bound Michigan = 41.7(0.09/0.69) = 5.4 sec

NS Bound Hewitt = 41.7(0.14/0.69) = 8.5 sec

Resulting Signal Timing Plans

G = 27.8 G = 5.4 G = 8.5

Y = 4.3 Y = 4.3 Y = 4.3

AR = 1.8 AR = 1.8 AR = 1.8

Hewitt and Ellsworth

East-WestEllsworth Road

Left Turn

East-WestEllsworth Road

North-SouthHewitt Road

NorthboundHewitt Road

Assume the following phasing plan.

Assume Saturation flow (S):

SThru = 1800 vphgpl, SLeft = 1200 vphgpl

YEW (Left) = Max [98/1200, 7/1200]

= 0.08 0.006

YEW (Left) = 0.08YEW (thru with permitted lefts)

= Max [220/1800, 206/1800, (289+56)/(1800*2)]

= 0.12 0.11 0.09

YEW THRU = 0.12Left turn-lane critical volumes were NOT considered in YEW (although permitted), since there is an exclusive left-turn phase for both directions

Hewitt and Ellsworth

Assume 70% of left-turn volumes and 50% of thru and right turn volumes go during the NB Split phase.

YNB (split) = Max [(289*0.7)/1200, (695+38)*(0.5)/(1800*2)]

= 0.17 0.10

YNB (split) = 0.17

YNS (thru and permitted lefts)

= Max [(289*3)/1200, (695+38)*0.5/(1800*2), 103/1200, (324+120)/(1800*2)]

= Max [0.07, 0.10, 0.08, 0.12]

YNS (thru and permitted lefts) = 0.12

Left turn-lane critical volumes were considered in YNS (although permitted), since there is not an exclusive left-turn phase for both directions and the left-turn demand has not dissipated.

1.5L + 5

1 - yi

L = sum of lost time per phase

# Phases = 4

L = 2(4) = 8 sec

yi = 0.08 + 0.12 + 0.17 + 0.12 = 0.49

1.5*8 + 5

1 – 0.49

Assume C = 90 sec, since there are 4 phases and total clearance interval time may be 24 sec.


C =

C = = 33 sec

Assume 85th Percentile Speed on Hewitt and Ellsworth = 45 mph = 66 fps

v

Y = t + 2(a+gG) = 1 + 66/20 = 4.3 sec

Assume width to clear Hewitt Road = 80 ft

Assume width to clear Ellsworth Road = 80 ft


All Red, AR = W + L = (80+20)/66 = 1.5 sec

V

Clearance Interval per phase

= 4.3 sec + 1.5 sec = 5.8 sec/phase

Total Clearance Time = (5.8 sec) ( 4 phases) = 23.2 sec

Net Green time = cycle length – total clearance time

= 90 – 23.2 = 66.8 sec


Calculation of SplitsGreen time for:

EW Left = 66.8(0.08/0.49) = 10.9 sec

EW Thru = 66.8(0.12/0.49) = 16.4 sec

NB Split = 66.8(0.17/0.49) = 23.2 sec

NS = 66.8(0.12/0.49) = 16.3 sec

Resulting Signal Timing Plans

G = 10.9 G = 16.4 G = 23.2 G = 16.3

Y = 4.3 Y = 4.3 Y = 4.3 Y =4.3

R* = 73.3 R* = 67.8 R* = 61.0 R* = 67.9

AR = 1.5 AR = 1.5 AR = 1.5 AR = 1.5

* Excludes All Red Time

Impact of Traffic Signal Systems on Traffic Crashes

EXAMPLES

Intersection: Seven Mile & Ryan

N

LEGEND

Seven Mile Road

Rya

n R

oad

Collision Diagram for Seven Mile Road and Ryan Road Intersection for Before Improvement Period from June 1994 - May 1995 (12 Months) data

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

1

2

3

4

5

6

7

89

10

11

12

13

14

15

16

17

1819

20

21

22

23

24

25

26

27

28

29

30

Driveway3132

33

34

35

36

37

38

39

40

41

42

43 44

4546

47

48

4950

51

N

LEGEND

Seven Mile Road

Rya

n R

oad


Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

1

2

3

4

5

6

7

89

10

11

12

13

14

15

16

17

1819

20

21

22

23

24

25

26

27

28

29

30

Driveway3132

33

34

35

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40

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42

43 44

4546

47

48

4950

51

N

LEGEND

Seven Mile Road

Rya

n R

oad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

1

2

3

4

56

7

8

9

10

11

12

13

14

15

16

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60

61

62

63

6465


N

LEGEND

Seven Mile Road

Rya

n R

oad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

1

2

3

4

56

7

8

9

10

11

12

13

14

15

16

17

18

19

20

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57

58

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60

61

62

63

6465


BEFORE PERIOD COLLISION DIAGRAMS

June 1995 – May 1996June 1994 – May 1995

BEFORE PERIOD COLLISION DIAGRAM

June 1996 – May 1997

N

LEGEND

Seven Mile Road

Rya

n R

oad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

1

2

34

5

6

7

8

9

10

11

12

13

14

1516

17

18

19

20

*

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45 4647

4849

50

51

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53

54

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*59

60

61

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63

64

65

66

67

*

Driveway Related

68

69

70

71

72

73

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76

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81

82


N

LEGEND

Seven Mile Road

Rya

n R

oad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

1

2

34

5

6

7

8

9

10

11

12

13

14

1516

17

18

19

20

**

21

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4849

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**59

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66

67

**

Driveway Related

68

69

70

71

72

73

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76

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79

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81

82


AFTER PERIOD COLLISION DIAGRAMS

June 1997 – December 1997

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Rya

n R

oad

Seven Mile Road

Collision Diagram for Seven Mile Road and Ryan for (June - December 1997) After Period

1

2

3

4

5

6

7

8

9

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14

13

15

16

17

18

19

20

21

22

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Rya

n R

oad

Seven Mile Road

Collision Diagram for Seven Mile Road and Ryan for (June - December 1997) After Period

1

2

3

4

5

6

7

8

9

10

11

12

14

13

15

16

17

18

19

20

21

22

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Rya

n R

oad

Seven Mile Road

Collision Diagram for Seven Mile Road and Ryan for (January - December 1998) After Period

1

2

3

4

5

6

7 8

9

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2324

25

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29

30

31

32

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Rya

n R

oad

Seven Mile Road


1

2

3

4

5

6

7 8

9

10

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12

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2324

25

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32

January 1998 – December 1998



N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Rya

n R

oad

Seven Mile Road


1

2

3

4

5

6

7

8

9

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12

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Rya

n R

oad

Seven Mile Road


1

2

3

4

5

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12


N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Rya

n R

oad

Seven Mile Road


1

2

3

4

5

6

7

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N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Rya

n R

oad

Seven Mile Road


1

2

3

4

5

6

7

8

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2627

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33

AFTER PERIOD COLLISION DIAGRAM


N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Rya

n R

oad

Seven Mile Road


1 2

3

4

5

*6

7

8

9

10

11

12

13

14

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1718

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21

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26

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Rya

n R

oad

Seven Mile Road


1 2

3

4

5

**6

7

8

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62

82

33

21.6

3435

46

36

17

3.2478

5

0

10

20

30

40

50

60

70

80

90

1994-1995 1995-1996 1996-1997 1997-1998 1998-1999 1999-2000 2000-2001 *2001-2002

Time* Represents Annual Average of 15 months (June 2001- August 2002) data

Ann

ual A

vera

ge T

otal

Cra

sh F

requ

ency

Annual Average Total CrashesAnnual Average Injury Crashes

Before After

Before (UD 10) and After (UD 10) Crash Data Comparison for Seven Mile Road and Ryan Road Intersection

10.7

20.7

8.79.1

3.8 2.7

31.2

67.7

17.318.7

7.2

5.3

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

Rear End Angle (Intersection) Left-Turn Head-On SideSwipe TOTAL InjuryPredominant Crash Types and Severity

* Represents Annual Average of 63 months (June 1997 - August 2002) data

Ann

ual A

vera

ge C

rash

Fre

quen

cy

Annual average of 3 years beforedata*Annual average of after data

Yearly Trend Analysis for Total and Injury Crashes for the Intersection of Seven Mile

Road and Ryan Road

Comparison of ‘Before and After’ Crashes for the Intersection of Seven

Mile Road and Ryan Road

Intersection: Seven Mile & John R.


September 1994 – August 1995

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Collision Diagram for Seven Mile Road and John R Road September 1994 – August 1995 (12 Months Before Period)

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

1

2

34

5

6

7

8

9

10

11

12

13

14

15

1617

18

19

20

21

22

23

24

25

26

27

28

29

30

3132

3334

3536

3738

39

4041

42

4344

45

46

47

48

49

50

51

52

53

54

55

56

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Collision Diagram for Seven Mile Road and John R Road September 1994 – August 1995 (12 Months Before Period)

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

1

2

34

55

6

7

8

9

10

11

12

13

14

15

1617

18

19

20

21

22

23

24

25

26

27

28

29

30

3132

3334

3536

3738

39

4041

42

4344

45

46

47

48

49

50

51

52

53

54

55

56

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Collision Diagram for Seven Mile Road and John R Road September 1995 – August 1996(12 Months Before Period)

1

2

4

3

5

6

7

8

9

* 10

11

12

13

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4950

51

52

53

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**


1

2

4

3

5

6

7

8

9

** 10

11

12

13

14

15

16

17

18

19

20

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4950

51

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53




N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

1

2

3

4

4

5

6

7

8 9

10

11

12

13

14

15

16

17 18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

*44

45

46

* 47

48

49

50


N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

1

2

3

4

4

5

6

7

8 9

10

11

12

13

14

15

16

17 18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

**44

45

46

** 47

48

49

50



N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Collision Diagram for Seven Mile Road and John R Road September 1997 – August 1998(12 Months After Period)

1

* 2

3

4

5

6

7

8

9

10

11

12

13

14

1516

17

18

19

20

21

22

2324

25

26

27

28

29

30

31

32

*33

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**


1

** 2

3

4

5

6

7

8

9

10

11

12

13

14

1516

17

18

19

20

21

22

2324

25

26

27

28

29

30

31

32

**33


N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*


1

2

3

4

19

5

6

7

8

9

10

11

12

13

14

1516

17

18

20

21

22

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**


1

2

3

4

19

5

6

7

8

9

10

11

12

13

14

1516

17

18

20

21

22



September 1999 – August 2000 September 2000 – August 2001

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*


1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

1920

*21

22

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**


1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

1920

**21

22

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*


1

2

3

4

5

6

7

8 9

1011

1213

14

15

16

17

18

19

20

*21

22*23

2425

26

27

28

29

30

31

32

33

34

35

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**


1

2

3

4

5

6

7

8 9

1011

1213

14

15

16

17

18

19

20

**21

22**23

2425

26

27

28

29

30

31

32

33

34

35


September 2001 – December 2001

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Collision Diagram for Seven Mile Road and John R Road September 2001 – December 2001(4 Months After Period)

1

23

4

57

7

N

LEGEND

Seven Mile Road

Joh

n R

Ro

ad

Rear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Collision Diagram for Seven Mile Road and John R Road September 2001 – December 2001(4 Months After Period)

1

23

4

57

7

Yearly Trend Analysis for Total and Injury Crashes for the Intersection of Seven Mile

Road and John R. Road

Comparison of ‘Before and After’ Crashes for the Intersection of Seven

Mile Road and John R. Road

56

51

33

22 22

31.5

15

21 21

2

5

9

48

8 7

7

0

10

20

30

40

50

60

*1994-1995 *1995-1996 *1996-1997 *1997-1998 *1998-1999 *1999-2000 *2000-2001 *2001-2002

Time*Represents an annual average of 12 month (September -August) data

An

nu

al

Av

era

ge

To

tal

Cra

sh F

req

uen

cy

Annual Average of Total Crashes

Annual Average of Injury Crashes

Before After

12.0

15.0

9.0

51.7

16.7

4.22.8

4.6

25.4

6.0

7.77.7

8.05.8

0.0

10.0

20.0

30.0

40.0

50.0

60.0

Rear End Angle(Intersection)

Left-Turn Head-On

SideSwipe Other TOTAL Injury

Predominant Crash Types and Severity *Represents an annual average of 60 months (Septembern1997 through August 2002) data

An

nu

al A

vera

ge C

rash

Fre

qu

ency

Annual Average of 3 years BeforeData* Annual average of After Data

Intersection: Hubbell & Puritan


November 1993 – October 1994

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

ad

Puritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 1993 – October 1994 (12 months Before Period)

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

21

22

23

24

25

26

27

28

29

3031

32

33

20

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

ad

Puritan Road


5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

21

22

23

24

25

26

27

28

29

3031

32

33

20

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

ad

Puritan Road


*

1

2 3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

2021

22

23

24

25

26

27

2829

30

31

32

33

34

*35

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

ad

Puritan Road


**

1

2 3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

2021

22

23

24

25

26

27

2829

30

31

32

33

34

**35




N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

ad

Puritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 1995 – October 1996(12 months Before Period)

* 12

3

4

5

6

7

8

9

10

11

12

13

14

15

16 17

18

19

20

21

22

23

24 25

26

2728

29

30

33

34

35

36

37

25

*32

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

ad

Puritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 1995 – October 1996(12 months Before Period)

** 12

3

4

5

6

7

8

9

10

11

12

13

14

15

16 17

18

19

20

21

22

23

24 25

26

2728

29

30

33

34

35

36

37

25

**32


N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

adPuritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 1997 –October 1998 (12 months After Period)

1

2

3

4

5

67

8

910

11

12

13

*14

15 16

17

18

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

adPuritan Road


1

2

3

4

5

67

8

910

11

12

13

**14

15 16

17

18

November 1997 – October 1998 November 1998 – October 1999

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

ad

Puritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 1998 –October 1999(12 months After Period)

1

2

3

4

*5

6

7

10

11

8

9

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

ad

Puritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 1998 –October 1999(12 months After Period)

1

2

3

4

**5

6

7

10

11

8

9


November 1999 – October 2000 November 2000 – October 2001

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

ad

Puritan Road


1

2

3

4

5

6

78

9

10

40

41

42

43

4445

*

46

47

48

*49 50

51

52

53

54

5556

57

58

59

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

ad

Puritan Road


1

2

3

4

5

6

78

9

10

40

41

42

43

4445

**

46

47

48

**49 50

51

52

53

54

5556

57

58

59

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

ad

Puritan Road


1

2

3

4

5

67

89

10

11

12

13

*14

15

16

17

18

19

20

21

22

*23

24

25

28

29

30

31

32

3334

35

363738

39

40

26

27

41

42

43

4445

*

46

47

48

*49 50

51

52

53

54

5556

57

58

59

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

ad

Puritan Road


1

2

3

4

5

67

89

10

11

12

13

**14

15

16

17

18

19

20

21

22

**23

24

25

28

29

30

31

32

3334

35

363738

39

40

26

27

41

42

43

4445

**

46

47

48

**49 50

51

52

53

54

5556

57

58

59


November 2001 – December 2001

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

*

Hu

bb

ell

Ro

ad

Puritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 2001 –December 2001 (2 months After Period)

1N

LEGENDRear-End

Backed Into

Head On

Angle

Left-TurnHead-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

Hu

bb

ell

Ro

ad

Puritan Road

Collision Diagram for Hubbell Street and Puritan Street from November 2001 –December 2001 (2 months After Period)

1

Yearly Trend Analysis for Total and Injury Crashes for the Intersection of Hubbell Road

and Puritan Road

Comparison of ‘Before and After’ Crashes for the Intersection of Hubbell

Road and Puritan Road

35.0

37.0

18.0

11.0

16.0

14.0

12.013.0

15.0

2.0 2.4

33.0

14.0

2.0

8.07.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

1993-1994 1994-1995 1995-1996 1997- 1998 1998-1999 1999-2000 2000-2001 *2001-2002

Time* Represents annual average of 10 Months (November 2001 - August 2002 ) data.

Ann

ual A

vera

ge C

rash

Fre

quen

cy

Annual Average of Toatal Crashes

Annual Average of Injury Crashes

Before

After

4.3

20.3

35.0

1.01.9

4.34.03.7

13.3

2.7

14.7

2.5 3.1

6.2

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

Rear End Angle (Intersection) Left-Turn Head-On SideSwipe Others TOTAL InjuryPredominant Types of Crashes

* Represents Annual Average of 58 Months ( November 1997 -August 2002) data

An

nu

al A

ver

age

Cra

sh F

req

uen

cy

Annual Average of 3 years BeforeData * Annual average of after data

signal timing design example problems. intersection of michigan avenue and hewitt road

Documents

sec slide

sec y i

y nsthru

vphgpl y ew left

y swsplit phase

left turn phase

y nb split

s left