Benefits of grid…? More direct routes –Less distance Less driving (?) –Less pollution, energy consumption, noise, etc. More walking/biking –More exercise, less weight, better health, etc. –Better efficiency Emergency response time City services
Facility Design Responsibility for building: –City/County: local streets, collectors, arterials –State: highways, freeways Influence on professional practice: –Institute of Transportation Engineers (ITE) –American Association of State Highway and Transportation Officials (AASHTO)
Traffic Calming "Traffic calming is the combination of mainly physical measures that reduce the negative effects of motor vehicle use, alter driver behavior and improve conditions for non-motorized street users." - ITE Subcommittee on Traffic Calming
Speed Control Measures Vertical DeflectionHorizontal Deflection Horizontal Narrowing Other Measures Speed HumpsTraffic CirclesNeckdownsExamples Speed TablesRoundabouts Center Island Narrowings Raised CrosswalksChicanesChockers Raised IntersectionsRealigned Intersections Textured Pavements Speed Lumps * Speed Cushion * Split Speed Hump * Volume Control Measures Divertive, RestrictiveOther Measures Full ClosuresExamples Half Closures Diagonal Diverters Lateral Shift * Median Barriers http://www.trafficcalming.org/measures2.html
Narrow Street Scenarios 28’ 52-56’ 24’ 47-52’ 20’ 42-48’ http://darkwing.uoregon.edu/~cpw/projects/pdf/featured/tgm_2003/powerpoints/285,13,Narrow Street Scenarios
Narrow Streets Canyon Rim Village, Medford http://darkwing.uoregon.edu/~cpw/projects/pdf/featured/tgm_2003/powerpoints/366,11,Narrow Streets
Marcy McInelly, SERA/Urbsworks Sustainable Streets …are rights of way designed and operated to create benefits relating to mobility, ecology and community that support a broad sustainability agenda...
Sustainable Street Design Network design: alignment, sizing, connectivity Allocation of right of way space Component design: paving, landscape, lighting, furnishings Sub-grade engineering and design Marcy McInelly, SERA/Urbsworks
Planning, Policy and Institutional Activities Construction Operations & Management Maintenance, Restoration & Repair Marcy McInelly, SERA/Urbsworks Beyond Street Design
Photo: Marcy McInelly, SERA/Urbsworks Movement Ecology Community Pillars of Sustainable Streets Marcy McInelly, SERA/Urbsworks
Riverfront Parkway and Downtown Streets, Chattanooga, TN Roadway Modifications Image: City of Chattanooga and River City Company
Riverfront Parkway, Chattanooga, TN “Before” Conditions Image: City of Chattanooga and River City Company
Image: City of Chattanooga Reconstructed Riverfront Parkway
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