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9 Street Safety & Bicycle Project
Park Slope, Brooklyn
Division of Street Management & Safety
Traffic Operations Bureau
February, 2007

Primary 9th Street Issues
1. High Speeds
2. Interrupted Thru Movements
3. Challenging Left Turns
4. Pedestrian Safety Concerns
5. Uncomfortable for Cyclists
Project Goal: A Safer and More Comfortable
Corridor Experience for ALL Street Users

Proposal Summary
A 4 Lane to 3 Lane “Road Diet”
– Left Turn Bays
– Bike Lanes
Carries existing 3 lane configuration at 4th Ave to Prospect Park
Fast Implementation: July 2007
Existing
Proposed

Issue 1: Speeds
Excess Capacity
– Atlantic Ave (at Clinton): 26,000 veh per day
– Vanderbilt Ave (at Atlantic): 19,000 vpd
9th St (at 6th Ave): 11,500 vpd
–
Thru Lane Removal
– 1 Lane means lead vehicle sets
pace
– Vanderbilt Ave and other “4 to 3”
reduction experience

Issue 2: Interrupted Thru Movement
Existing Condition
Existing Condition
Double-parked auto
Double-parked auto Autos moving thru
Autos moving thru
or bicyclist
or bicyclist
Left-turning vehicle
Left-turning vehicle
Right lane vehicles
Right lane vehicles
waiting for gap
waiting for gap
change lanes twice
change lanes twice

Issue 2: Interrupted Thru Movement
Proposed Condition
Proposed Condition
Bicyclist Double-parked auto
Bicyclist Double-parked auto
Left-turning vehicle No lane changes
Left-turning vehicle No lane changes
waiting for gap
waiting for gap

Issue 3: Challenging Left Turns
Left Turning Motorist Have
Existing Condition
Existing Condition
4 Concerns
1) Vehicles Approaching
1) Vehicles Approaching
from Behind
from Behind
2) Identifying Gap in Left Lane
2) Identifying Gap in Left Lane
3) ID’ing Gap in Right
3) ID’ing Gap in Right
Lane
Lane
4) ID’ing Pedestrians in
4) ID’ing Pedestrians in
(VISIBILITY HINDERED)
(VISIBILITY HINDERED)
Crosswalk
Crosswalk

Issue 3: Challenging Left Turns
Only 2 Points of Focus and
No Visibility Problem
Proposed Condition
Proposed Condition
Vehicles from behind in
Vehicles from behind in
different lane
different lane
Driver only needs ONE gap to
Driver only needs ONE gap to
turn; can then look at crosswalk
turn; can then look at crosswalk

Issue 4: Pedestrian Safety Concerns
Lane Assignments, Speed
Reduction & Simplified Operations
Potential Refuge Islands at
Crossings with One Way Avenues

Issue 5: Uncomfortable Cycling
Environment
• Cyclist squeezes b/w • Cyclist separated from
moving lane and parked travel lanes
cars, or
• “Takes” moving lane
CENTER
CENTER
SIDEWALK
SIDEWALK
9’ 10’ 10’ 8’ 5’ 11’ Flush
Parking Moving Moving Parking Bike Lane w/ Moving Median
Lane Lane Lane Lane 3’ buffer Lane (4’ / 2)
Proposed Condition
Existing Condition Proposed Condition
Existing Condition

Bicycle Network Benefits

Implemented with Brooklyn Greenway
Connection to Columbia Street Promenade
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July 2007 – Center of Brooklyn Connected to
Prospect Park and Red Hook Waterfront on a
Continuous Bike Route

Summary
Project Goal: A Safer and More Comfortable
Corridor Experience for ALL Street Users
Motorists –
– Simplified and Safer Operations
– Center median reduces head on crash risk
Pedestrians –
– More Comfortable and Safe with Potential for Capital
Improvements
Cyclists –
– Dramatically improved experience
– Connections to major attractors
New Street in July
– “Operational” Design Allows for Rapid Implementation