Download - Walkability R Bloodworth
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WalkabilityIt’s a Human Issue!
Collierville, TN Seminar. Bloodworth
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Why it matters.
22 out of 100
26 out of 100
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DPZ
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1250 Ft
Chickasaw Gardens
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Permeability
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The Structure of a Sponge: Many, many connections
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Poor permeability increases the distance traveled.
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It’s all about the Block
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Top 10 Walkability Factors
• 10. Street Trees• 9. Lower Volumes• 8. Sidewalks• 7. Narrow Streets • 6. Interconnected Streets
• 5. On Street Parking• 4. Lower Traffic Speeds• 3. Mixed Land Use• 2. Buildings Fronting St. • 1. Small Block Size!
Rick Hall, P.E.
Plus Density, Vibrancy and Eyes on the Street
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1000 Ft
Portland
250
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1700
2850 Ft
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700
2000 Ft
2250 Ft
Peabody
Vinton
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4580 Ft
5050 Ft
3300 Ft 2250 Ft
2250 Ft
1250 Ft
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4580 Ft
5050 Ft
3300 Ft 2250 Ft
2250 Ft
1250 Ft
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1380 Ft 1380 Ft
1350 Ft
1350 Ft
1550 Ft
1350 Ft 1200 Ft
450
350
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810 ft Average Block Perimeter
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Block PerimeterPoundbury Block Perimeter
600-700Radius
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NA ? 4500 2500 2000 1600
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Fine GrainIt’s a Human Issue!
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Block Face
Block length (in feet)Excellent: 250-400
Good: 400-500Acceptable: 500-600
Fair: 600-800Poor: more than 800
–TND Design Rating Standards, Version 1.5 (2005)
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SafeIt’s a Human Issue!
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Street Capacity
4-lane arterial @ 45mph = 2400 vph
Two 2-lane streets @ 30mph = 3600 vph
Credit: Tim Jackson
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InterestingIt’s a Human Issue!
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MixtureHow do you like your
Pizza?
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Downtown Collierville
68 out of 100
Pizza Supreme!
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Measuring Walkability
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What Makes a Neighborhood Walkable
• A center: Walkable neighborhoods have a discernable center, whether it's a shopping district, a main street, or a public space.
• Density: The neighborhood is compact enough for local businesses to flourish and for public transportation to run frequently.
• Mixed income, mixed use: Housing is provided for everyone who works in the neighborhood: young and old, singles and families, rich and poor. Businesses and residences are located near each other.
• Parks and public space: There are plenty of public places to gather and play.
• On street parallel parking. The car acts as a buffer of protection.• Pedestrian-centric design: Buildings are placed close to the street
to cater to foot traffic, with parking lots relegated to the back. • Nearby schools and workplaces: Schools and workplaces are
close enough that most residents can walk from their homes. • Streets are skinny, speeds slow.
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• Average Block Perimeter.• Average Block Face.• Blocks per Sq Mile• Number of intersections per Sq Mile• Number of uses within Walk Distance• Implied vehicular speeds.• Quality of frontages and fit-up.• Residential and worker density
Measures
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Walk Score• Your Walk Score is a number between 0 and 100. Here are
general guidelines for interpreting your score:• 90–100 = Walkers' Paradise: Most errands can be accomplished
on foot and many people get by without owning a car. • 70–89 = Very Walkable: It's possible to get by without owning a
car. • 50–69 = Somewhat Walkable: Some stores and amenities are
within walking distance, but many everyday trips still require a bike, public transportation, or car.
• 25–49 = Car-Dependent: Only a few destinations are within easy walking range. For most errands, driving or public transportation is a must.
• 0–24 = Car-Dependent (Driving Only): Virtually no neighborhood destinations within walking range. You can walk from your house to your car!
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RDI Example: Pre Neighborhood Connector
Route Directness Index can better illustrate Route Directness Index can better illustrate “before-and-after” Plan improvements“before-and-after” Plan improvements
Existing Shared-Use Path
Route Directness IndexRoute Directness Index
Crow FlightCrow Flight
Walk DistanceWalk Distance
1850 ft1850 ft
1850 ft1850 ft
RDIRDI
RDI: .20RDI: .20
.20.20
//
==
375 ft375 ft
375 ft375 ft
Transpogroup
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Route Directness Index can better illustrate Route Directness Index can better illustrate “before-and-after” Plan improvements“before-and-after” Plan improvements
RDI Example: Post Neighborhood Connector
Existing Shared-Use Path
Route Directness IndexRoute Directness Index
Crow FlightCrow Flight
Walk DistanceWalk Distance
RDIRDI
==
375 ft375 ft
375 ft375 ft
RDI: .83RDI: .83
.83.83
New Neighborhood
Connectors
450 ft450 ft
450 ft450 ft
//
Transpogroup
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The Regional Picture
Putting it all together
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Australian Urban Model; Evan Jones
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Credits: Movement for Israeli Urbanism and the J. Blaustein Institutes for Desert ResearchMICHAEL MEHAFFY, SERGIO PORTA, NIKOS SALINGAROS, YODAN ROFE
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WalkabilityIt’s a Human Issue!
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Additional SlidesFor discussion if needed
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Block Perimeter
Block Perimeter (in feet)Excellent: 1000-1600
Good: 1600-2000Acceptable: 2000-2400
Fair: 2400-3200Poor: more than 3200
How long will it take to walk the perimeter of the block?
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Streets Designed for Everyone• Complete Streets are roads are designed for everyone who
uses them, including bicyclists, pedestrians of all ages and abilities, and people getting on and off transit vehicles. These streets are:
• Accessible: There are wheelchair ramps, plenty of benches with shade, sidewalks on all streets, etc.
• Well-connected: Streets form a connected grid that improves traffic by providing many routes to any destination.
• Built for the right speed: Lanes are narrow or traffic calming is in place to control speed.
• Comfortable: Pedestrian medians at intersections, count-down crosswalk timers, bicycle lanes, protected bus shelters, etc. make the street work better for those outside of a car.
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