The increased proximity provided by more compact and centralized development is about ten times more influential than vehicle traffic speed on the number of destinations that people can reach within a given travel time.
Researchers analyzed the number of destinations that can be accessed within a given amount of travel time by mode (automobile and transit) and purpose (work and non-work trips) for about 30 US metropolitan areas. They found that although denser urban development tends to reduce vehicle travel speeds, the increased proximity is about ten times more influential than travel speed in determining a metropolitan area’s overall accessibility. This indicates that smart growth policies which increase development density and mix, transport network connectivity, and transport system diversity can do more to improve overall transport system performance than efforts to increase traffic speeds and reduce congestion.
The authors conclude, "Having destinations nearby, as when densities are high, offers benefits even when the associated congestion slows traffic. Where land use policy frequently seeks to support low-development densities in part in an attempt to maintain travel speeds and forestall traffic congestion, our findings suggest that compact development can often improve transportation outcomes."
Toward More Comprehensive Understanding of Traffic Congestion
Conventional planning tends to consider traffic congestion asignificant cost and roadway expansion the preferred solution. It evaluates transport system performance based on indicators such as roadway Level of Service (LOS) and peak-period traffic
New Orleans Makes Push for Accessibility Improvements Ahead of Super Bowl
Major sporting events like the Olympics and the Super Bowl can serve as catalysts for major changes in transportation infrastructure and accessibility.
Planning for Accessibility: Proximity is More Important than Mobility
Accessibility-based planning minimizes the distance that people must travel to reach desired services and activities. Measured this way, increased density can provide more total benefits than increased speeds.
Trump Administration Could Effectively End Housing Voucher Program
Federal officials are eyeing major cuts to the Section 8 program that helps millions of low-income households pay rent.
Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
Ken Jennings Launches Transit Web Series
The Jeopardy champ wants you to ride public transit.
Driving Equity and Clean Air: California Invests in Greener School Transportation
California has awarded $500 million to fund 1,000 zero-emission school buses and chargers for educational agencies as part of its effort to reduce pollution, improve student health, and accelerate the transition to clean transportation.
Congress Moves to End Reconnecting Communities and Related Grants
The House Transportation and Infrastructure Committee moved to rescind funding for the Neighborhood Equity and Access program, which funds highway removals, freeway caps, transit projects, pedestrian infrastructure, and more.
From Throughway to Public Space: Taking Back the American Street
How the Covid-19 pandemic taught us new ways to reclaim city streets from cars.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Heyer Gruel & Associates PA
Ada County Highway District
Institute for Housing and Urban Development Studies (IHS)
City of Grandview
Harvard GSD Executive Education
Toledo-Lucas County Plan Commissions
Salt Lake City
NYU Wagner Graduate School of Public Service