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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




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


Berkeley diverters
Berkeley Diverters http://www.fotosearch.com/photos-images/cul-de-sac.html

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


Village homes davis
Village Homes, Davis http://www.fotosearch.com/photos-images/cul-de-sac.html

Source: Google Maps


Davis Greenbelt System http://www.fotosearch.com/photos-images/cul-de-sac.html


Houten, Netherlands http://www.fotosearch.com/photos-images/cul-de-sac.html

Source: Google Maps


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


Facility design
Facility Design http://www.fotosearch.com/photos-images/cul-de-sac.html

  • 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)


http://www.ite.org/bookstore/RP-011C.pdf http://www.fotosearch.com/photos-images/cul-de-sac.html


http://www.ite.org/bookstore/RP-011C.pdf http://www.fotosearch.com/photos-images/cul-de-sac.html


http://www.ite.org/bookstore/RP-011C.pdf http://www.fotosearch.com/photos-images/cul-de-sac.html


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


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


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


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


Innovations trends
Innovations/Trends http://www.ashland.or.us/Files/street%20standards_001.pdf

  • Traffic Calming

  • Skinny Streets

  • “Complete the Streets”

  • Context-Sensitive Design

  • Others…


Traffic calming
Traffic Calming http://www.ashland.or.us/Files/street%20standards_001.pdf

"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


http://www.trafficcalming.org/measures2.html http://www.ashland.or.us/Files/street%20standards_001.pdf


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

Traffic Circles

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


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

Chicanes

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


Narrow street scenarios
Narrow Street Scenarios http://www.ashland.or.us/Files/street%20standards_001.pdf

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

Canyon Rim Village, Medford

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


Sustainable Streets http://www.ashland.or.us/Files/street%20standards_001.pdf…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 http://www.ashland.or.us/Files/street%20standards_001.pdf

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

  • Planning, Policy and Institutional Activities

  • Construction

  • Operations & Management

  • Maintenance, Restoration & Repair

Marcy McInelly, SERA/Urbsworks


Movement ecology community

Pillars of Sustainable Streets http://www.ashland.or.us/Files/street%20standards_001.pdf

Movement Ecology Community

Photo: Marcy McInelly, SERA/Urbsworks

Marcy McInelly, SERA/Urbsworks


Riverfront Parkway and http://www.ashland.or.us/Files/street%20standards_001.pdf

Downtown Streets, Chattanooga, TN

Roadway Modifications

Image: City of Chattanooga and River City Company


Riverfront Parkway, Chattanooga, TN http://www.ashland.or.us/Files/street%20standards_001.pdf

“Before” Conditions

Image: City of Chattanooga and River City Company


Reconstructed Riverfront Parkway http://www.ashland.or.us/Files/street%20standards_001.pdf

Image: City of Chattanooga


http://www.completestreets.com/early.html http://www.ashland.or.us/Files/street%20standards_001.pdf


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


Context sensitive design
“Context-Sensitive Design”https://bookstore.transportation.org/item_details.aspx?ID=110


Next up pavements
Next up: Pavementshttps://bookstore.transportation.org/item_details.aspx?ID=110


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