intuitive intersection design case study: broadway & 96th street
TRANSCRIPT
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Intuitive Intersection Design Case Study: Broadway & 96th Street
Joshua Benson, AICP, NYC Department of Transportation
NACTO Designing Cities Conference, San Francisco, October 24, 2014
• Vision zero – Mayoral Initiative: Eliminate all traffic fatalities
in NYC by 2020
– 270 traffic fatalities/year average last 3 years
– NYC has committed to focused enforcement,
education, policy & street design changes
• Street Design Projects – 70 intersection & corridor projects/year, 50 VZ
– Case Study: Broadway at 96th Street
– Leveraging Geometric & Signalization
changes 3
Street Improvement Projects in NYC
• 2007: Subway reconstruction begins
• 2010: Subway reconstruction completed
• 2014:
– January 10 & 19: Pedestrian fatalities
– January 30: DOT Presents proposal to
Community Board 7
– March 25: Intersection project begins
– May 20: Intersection project completed
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Project Timeline
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Context
• Major subway station: 3 lines, express & local service
• Heavy bus to subway transfer point
• High density housing, retail corridors, high pedestrian activity
• Regional motor vehicle traffic accessing highway interchange two
blocks away
• Multiyear capital project to overhaul subway station & reconfigure
intersection (2007-2010)
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Fatalities • Alexander Shear, Jan 10, 2014
• Samantha Lee, Jan 19, 2014
Injuries (2008-2012)
• Zero severe injuries
• 52 total injuries, 20 pedestrian
Recent pedestrian fatalities
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Legal trip from NW corner to Subway
may have initial delay of 47 seconds
Trip may take as long
as 1 minute 45 seconds
Phase A:
15 secs
Phase B:
28 secs
Phase C:
15 secs
Phase D:
32 secs
Pedestrian must cross
south first, then east-west
Signal Timing Multiphase Signal Prioritizes Left Turn Movements
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Observed Issues Rampant Crossing against signal
Pedestrians crossing median to median without crosswalk or
signal during perceived gaps
Not strong indicators of intuitive intersection design
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3. New mall to
mall crosswalk
1. Two left turns
banned: SB Broadway to EB W96th and
WB W96th St to SB Broadway
2. Expanded
pedestrian space on
north mall
Proposed Plan
4. New flush
median & lane
designations for
W. 96th St
N 5. Simpler
signal
phasing…
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Proposed Signal Phasing
Phase A:
43 secs
Legal trip from NW corner to Subway has zero initial delay
Phase B:
15 secs Phase C:
32 secs
58 seconds maximum trip time
Pedestrian has route flexibility/control
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Pedestrian Crossing Time (Seconds) Proposed
32
43 0 43
32
47
32
58 43 43
+15
+15 +43
Increase
Existing
N
Web: nyc.gov/dot
Email: [email protected]
• Captures flow of actual usage
• Creates direct pedestrian routes
• Offers more choice/control for pedestrians
• Eliminates excess delay
• Emphasizes Turn restrictions
• Zero pedestrian injuries since
implementation
Thank
You
Intuitive Design at Broadway & 96th