land use

Major roads undercut safety benefits of highly accessible places

By Chris McCahill In working with transportation agencies across the U.S., our team often faces questions about the role of safety in accessibility analysis. While we know the safety and comfort of streets clearly impacts access for people on foot or bicycle, the effects of accessibility on

The argument for ending single-family zoning

By Rayla Bellis An article in the latest issue of the Journal of the American Planning Association makes a case for getting rid of single-family zoning in U.S. cities. The authors, professors at UCLA’s Department of Urban Planning, argue that single-family zoning (often called “R1” zoning)

Exploring the relationship between transit supply and parking demand

By Saumya Jain In a recent study, researchers from Australia look closely at the relationship between parking demand and proximity and quality of service supply of public transit. When other socioeconomic factors were considered, the quality of transit service became much more important than

LOS to play more limited role in California planning, according to survey

By Chris McCahill A new survey of planning officials in California finds that most are embracing the shift from highway level of service to vehicle miles traveled for evaluating the environmental impacts of new development projects. While some are ditching LOS altogether, however, many still rely

Growth near transit is key to connecting smaller cities, SSTI finds

By Chris McCahill A new study by SSTI and the Traffic Operations and Safety Lab at UW-Madison provides a partial roadmap to the future for transit in smaller cities. The study gave Eau Claire, Wisconsin—a city nearing 70,000 people—a look into emerging transit technologies and insight on

Dense areas are safer but road design is critical

By Chris McCahill Dense development patterns offer important safety benefits, according to new research from the University of Pennsylvania, but high-speed roads in dense suburban centers are deadly for pedestrians. This new study confirms what others have already shown—that attention to

Seattle moves to new transportation level of service guidelines

By Robbie Webber On January 14, the Seattle Council is set to vote on new regulations for developments to support changes in adopted transportation level of service. As part of the 2016 Comprehensive Plan, LOS was redefined to reflect specific target rates for different modes in eight different

Modernizing Mitigation: A Demand-Centered Approach (SSTI, September 2018)

Cities exist to provide people and firms with access to goods, services, employment, and other people. A mark of a city’s success is the clustering of complementary land uses to residents’ and businesses’ mutual benefit; the more people and activities within reach of each other, the greater

U.S. cities and developers beleaguered by too much parking, Mortgage Bankers report finds

By Eric Sundquist There are 83,141 households in the city of Des Moines, and 1.6 million parking stalls. Even allowing that some of those 1.6 million stalls are occupied by commuters originating from outside the city, that’s a pretty staggering disparity (Figure 1). And even accounting for

Estimating the amount people drive based on accessibility measures

By Logan Dredske How does the built environment influence the amount people drive? Research by SSTI’s Logan Dredske worked to answer this very question. The focus of his research was to create a framework for estimating vehicle miles traveled based on conditions of the built environment. His