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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?.

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road design

Road Design

Susan Handy

TTP Orientation Seminar

October 2009

topics
Topics
  • Network design
  • Facility design
network 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
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
slide16

Source: http://www.fotosearch.com/photos-images/cul-de-sac.html

berkeley diverters
Berkeley Diverters

Source: http://www.ci.berkeley.ca.us/transportation/Bicycling/BB/BicycleBoulevardTreatments.html

village homes davis
Village Homes, Davis

Source: Google Maps

slide20

Houten, Netherlands

Source: Google Maps

facility design
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)
slide26

Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

slide27

Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

slide28

Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

slide29

Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

innovations trends
Innovations/Trends
  • Traffic Calming
  • Skinny Streets
  • “Complete the Streets”
  • Context-Sensitive Design
  • Others…
traffic calming
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

slide33

Roundabouts

Traffic Circles

http://www.trafficcalming.org/measures2.html

slide34

Neckdowns

Chicanes

http://www.trafficcalming.org/measures2.html

narrow street scenarios
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
Narrow Streets

Canyon Rim Village, Medford

http://darkwing.uoregon.edu/~cpw/projects/pdf/featured/tgm_2003/powerpoints/366,11,Narrow Streets

slide37

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
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
Beyond Street Design
  • Planning, Policy and Institutional Activities
  • Construction
  • Operations & Management
  • Maintenance, Restoration & Repair

Marcy McInelly, SERA/Urbsworks

movement ecology community

Pillars of Sustainable Streets

Movement Ecology Community

Photo: Marcy McInelly, SERA/Urbsworks

Marcy McInelly, SERA/Urbsworks

slide41

Riverfront Parkway and

Downtown Streets, Chattanooga, TN

Roadway Modifications

Image: City of Chattanooga and River City Company

slide42

Riverfront Parkway, Chattanooga, TN

“Before” Conditions

Image: City of Chattanooga and River City Company

slide43

Reconstructed Riverfront Parkway

Image: City of Chattanooga

slide45

https://bookstore.transportation.org/item_details.aspx?ID=110https://bookstore.transportation.org/item_details.aspx?ID=110

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