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
National Committee on Urban Transportation, 1958
City of Sunnyvale, 1957
ITE Street Layout Principles, 1984
City of Austin, Comprehensive Plan, 1994
Connectivity Measures
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: Handy, Paterson, and Butler 2003
Source: Handy, Paterson, and Butler 2003
Source: http://www.fotosearch.com/photos-images/cul-de-sac.html
Berkeley Diverters
Source: http://www.ci.berkeley.ca.us/transportation/Bicycling/BB/BicycleBoulevardTreatments.html
Village Homes, Davis
Source: Google Maps
Davis Greenbelt System
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:

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