Road Design. Susan Handy TTP Orientation Seminar October 2009. Topics. Network design Facility design. Network Design. What are the two main purposes of streets/roads/highways? What’s the main difference between streets vs. roads vs. highways?.
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Road Design Susan Handy TTP Orientation Seminar October 2009
Topics • Network design • Facility design
Network Design • What are the two main purposes of streets/roads/highways? • What’s the main difference between streets vs. roads vs. highways?
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
Berkeley Diverters Source: http://www.ci.berkeley.ca.us/transportation/Bicycling/BB/BicycleBoulevardTreatments.html
Village Homes, Davis Source: Google Maps
Houten, Netherlands Source: Google Maps
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)
Innovations/Trends • Traffic Calming • Skinny Streets • “Complete the Streets” • Context-Sensitive Design • Others…
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
Roundabouts Traffic Circles http://www.trafficcalming.org/measures2.html
Neckdowns Chicanes 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
Sustainable Streets…are rights of way designed and operated to create benefits relating to mobility, ecology and community that support a broad sustainability agenda... Marcy McInelly, SERA/Urbsworks
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
Beyond Street Design • Planning, Policy and Institutional Activities • Construction • Operations & Management • Maintenance, Restoration & Repair Marcy McInelly, SERA/Urbsworks
Pillars of Sustainable Streets Movement Ecology Community Photo: Marcy McInelly, SERA/Urbsworks 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
Reconstructed Riverfront Parkway Image: City of Chattanooga