Main Street King Street Charrette Final Presentation

1

Northampton Main/King Charrette

Nelson\Nygaard Consulting Associates

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33

44

55

66

77

88

99

1010

1111

1212

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1818

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2020

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Overbuilt streets cause speeding

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Planning for pedestrian safety: Principles

Leaf, W. and Preusser, D. Literature Review on Vehicle Travel Speeds and Pedestrian Injuries

Among Selected Racial/Ethnic Groups, NHTSA (USA), 1999.

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Wide Streets Are Less Safe

Street widths and injury accident rate, graphic by Peter Swift

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Seattle Conversions (4 to 3 Lane)

Roadway Date ADT ADT Collision

Location Change Before After Reduction

Greenwood Ave N

N 80th St to N 50th

N 45th Street

Wallingford Area

8th Ave NW

Ballard Area

Martin Luther King Jr W

North of I 90

Dexter Ave N

Queen Ann Area

24th Ave NW

NW 85th to NW 65thOct-95 9727 9754

14 to 10

28%

Jun-91 13606 1494919 to 16

59%

Jan-94 12336 1316115 to 6

60%

Jan-94 10549 1185818 to 7

61%

Dec-72 19421 2027445 to 23

49%

Apr-95 11872 1242724 to 10

58%

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Taking a Road Diet

26

Seattle Conversions (4 to 3 Lane)

Roadway Date ADT ADT Collision

Location Change Before After Reduction

Greenwood Ave N

N 80th St to N 50th

N 45th Street

Wallingford Area

8th Ave NW

Ballard Area

Martin Luther King Jr W

North of I 90

Dexter Ave N

Queen Ann Area

24th Ave NW

NW 85th to NW 65thOct-95 9727 9754

14 to 10

28%

Jun-91 13606 1494919 to 16

59%

Jan-94 12336 1316115 to 6

60%

Jan-94 10549 1185818 to 7

61%

Dec-72 19421 2027445 to 23

49%

Apr-95 11872 1242724 to 10

58%

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Greenwood Avenue: 12,000 cars per day

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Dexter Ave: 15,000 cars per day

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45th Street in Wallingford: 20,000 cars per day

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31Northern King Street – 80’ Right-of-Way

EXISTING

32Middle King Street – 62’ Right-of-Way

IDEAL

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34

School

Shop

PlayWork

PP

P

P

PP

T TT T

TTT

TTT

T

T

Conventional Development

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Mixed-Use District

School

Work

Play

Shop

P

TT

Results:

<½ the parking

<½ the land area

¼ the arterial trips

1/6th the arterial turning movements

<¼ the vehicle miles travelled

36Middle King Street – 62’ Right-of-Way

EXISTING

37Middle King Street – 62’ Right-of-Way

IDEAL

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39Southern King Street – 55’ Right-of-Way

EXISTING

40Southern King Street – 55’ Right-of-Way

IDEAL

41Southern King Street – 55’ Right-of-Way

CHANGES IN PAINT

4242

4343

4444

45

46

4747

4848

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5151

5252

5353

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5555

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5757

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space….