Narrow Streets, Timely Response: Healthy Streets for America

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  • Narrow Streets, Timely ResponseHealthy Streets for America Overhang 14 feetDan Burden, Senior Urban Designer, Glatting Jackson and Director of Walkable Communities, Inc.

  • Turning Radius must also accommodate overhang

  • 85% to 93% of all calls are now medical or traffic related

  • Traffic Calming PublicationsAuthored by: Dan BurdenWalkable Communities

  • The World is ChangingExpect:

    Option One:

    25% more traffic every ten years. More intersections failing. More people spreading out into canyons, ridges and other high risk locations.

    Also Expect: More cars per householdLimited new lanes and limits on intersections being rebuiltMore demand for slowing trafficMore demand for traffic to stay in motionMore demand for safer streetsMore demand for quieter streets

  • Give us nearly free movement for our first 80% of our journey, and protect our access to the final 20%

  • What planners, developers and people often fear

  • What planners, developers and people want

  • Portland, Oregon

  • Charlottesville, Virginia

  • Proper width entry, and protected space is on the correct side of the intersectionNew Hope, Seattle, Washington

  • Healthy street system provide quick, efficient, uncluttered travel ways and response times on major routes leading up to local street system

  • Cambridge, Mass.

  • 32nd STREET BARRICADE

  • 32nd STREET BARRICADE

  • 42nd STREET BARRICADE

  • 42nd STREET BARRICADE

  • EXISTING NETWORK

  • EFFECTIVE NETWORK

  • 1) Why is connectivity important?

  • Most Trips are Internal12 Points of Access

  • 250 125 75 2115

  • Land Use

  • Connectivity Requirements - ExamplesLink-node ratio of 1.44Virginia DOT

  • Connectivity RequirementsCompact Area Type for Network AdditionsLink-Node Ratio of 1.6 or greaterOne external connection as well as an additional external connection and stub-out per 50 links or fraction thereofVirginia DOT

  • Connectivity RequirementsSuburban Area Type for Network AdditionsLink-Node Ratio of 1.4 or greaterOne external connection as well as an additional external connection and stub-out per 50 links or fraction thereof

    Virginia DOT

  • Meriam Park, Chico, California

  • Connectivity:NetworkHolcomb Bridge Rd.Alpharetta Hwy.Crossville Rd.Crabapple Rd.Old Ala Rd.Hembree Rd.AzaleaPine Grove Rd.Marietta Hwy.Woodstock Rd.Riverside Rd.Hardscrabble Rd.Houze Rd.3,568 miles of roads

  • Connectivity:Effective Network21% of the Total Network is EffectiveHolcomb Bridge Rd.Alpharetta Hwy.Crossville Rd.Crabapple Rd.Old Ala Rd.Hembree Rd.AzaleaPine Grove Rd.Marietta Hwy.Woodstock Rd.Riverside Rd.Hardscrabble Rd.Houze Rd.735 miles of roadsU.S. Vehicle Miles Traveled (Per Capita) is 27 miles DailyAtlanta Vehicle Miles Traveled (Per Capita) is 66 miles Daily

  • Primary responseSecondary responseTertiary responseNeighborhood connectorUse trail connectors and neighborhood connectors for added entries

  • Bellevue, Washington

  • 186th S.E. Bellevue, Washington

  • Bellevue, Washington

  • Bellevue, Washington

  • Bellevue, Washington

  • Sammamish, Washington

  • University Place, Washington

  • University Place, Washington

  • University Place, Washington

  • Martin Luther King, Pensacola, Florida

  • Healthy Streets

  • Access

  • Primary response

  • Ten Foot Visual Space13 Foot Physical Space

  • Gainesville, FloridaMotorist parks in Tee intersection blocks large equipment from entrySolution?Curb extensionsTwo-Step curbing

  • Charlottesville, Virginia

  • Protect Access to all Locations No humps or bumps (some tables or raised intersections) Proper turn radii (protect right-turn entries) Preserve 20 operations width Bike lanes and parking help with turning radius Set landscape features back from corners Curb extensions are helpful in protecting access Provide high connectivity (system redundancy)Performance Measure: Able to maintain 4 minute response time to all most locations Use care in tree selection and placement

  • Gainesville, Florida Emergency Response Team and Public Works Department

  • Unit is able to clear chicane at 28 mph

  • Gainesville, FloridaCritical entry to neighborhood. Streets are too narrow for rare event.Bus breaks down, emergency call comes in. Only one way in

  • Two micron clearance!!!Gainesville, Florida

  • 8.0 ftouter wheel42.0 ftinner wheel28.3 ftoverhang43.5 ftSingle Unit (SU) Truck Turning RadiusReframing Key Transportation Conventions DESIGN TRAFFIC Vehicle Types

  • Plan must provide adequate turning radii,

    not excessive width

    Departure road 20.0 feet wide, Entry road 20.0 feet wide turning radius of vehicle: WB-40AASHTO and other national standards permit designers to use full roadway receiving radius for oversize vehiclesA fine grained road system with well distributed traffic allows narrow entriesControlling VehicleExtra-Ordinary vehicle using road section can be accommodated through other solutions at site.

  • Chico, CaliforniaBike lanes provide places for motorists to pull over.

    Widths of 5-7 feet are effective

  • 20 FeetProper width entry, but protected space is on the wrong side of the intersection

  • Midblock Access

  • Seattle, Washington

  • Issaquah Highlands, WashingtonMotor Court

  • Upper Arlington, Ohio

  • Suisun City, California

  • Ten Foot Visual Space13 Foot Physical Space

  • Right-of-Way 68- 84 feet12'7-11'12-20'7-11'5' 10'10'7' 7' 5' AVENUE

  • 7 Feet6 Feet6 FeetUniversity Place, WashingtonCurb-to-Curb 17 feet 33 mph running speeds

  • 12 Feet5 FeetNatomas, Sacramento, CaliforniaCurb-to-Curb 17 feet 38 mph running speeds

  • What fire administrators often fearWhat Fire administrators should acceptPetaluma, CaliforniaBoth streets are 28 feet wide (Yield Streets)

  • Mill Valley, Washington11 Feet10 Feet11 Feet

  • Federal Blvd, Denver, Colorado

  • New Hope, Seattle, Washington

  • New Hope, Seattle, Washington

  • Healthy streets provide the best opportunity to sustain property value (traffic calmed neighborhoods increase property values), which increases tax base to sustain high quality government services, including emergency response.

  • Speeds:20-22 mph28-32 mphValueSame homes$5-15K less

    Suisun City, California

  • ALLEY Right-of-way 20 22 feet10-12'5' 8' 8'5'

  • Corner radii are tight, but mountable

  • Mobile Narrow Streets WorkshopPetaluma, California

  • Accessible ladders

  • Acacia Roundabout, Clearwater, Florida

  • La Jolla Boulevard, Bird Rock, San Diego, California (Five to two lane conversion, before). Four signals and one four-way stop being removed. Back-in Angled parking to be added. (23,000 ADT)

  • La Jolla Boulevard, Bird Rock, San Diego, California14 Feet

  • Healthy streets provide the best opportunity to sustain property value (traffic calmed neighborhoods increase property values), which increases tax base to sustain high quality government services, including emergency response.

  • Speeds:20-22 mph28-32 mphValue:Same homes$5-15K less

    Suisun City, California

  • Philadelphia, Pennsylvania

  • Cambridge, Mass.

  • In MemoriamFire Chief, Ralph Burden1915- 2000Thanks, DadFor Everything

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