Analysis indicates that compact development reduces the time urban residents spent in traffic and requires less spending on highways.
This new study by CEOs for Cities critiques methods used to measure traffic congestion costs and evaluate congestion reduction strategies. It criticizes the Travel Time Index (TTI) used in the commonly-cited Urban Mobility Report as an unreliable guide for understanding the nature and extent of urban transportation problems. The TTI uses flawed speed and fuel economy estimates which overstate traffic congestion costs, and it ignores the increased transportation costs associated with more dispersed land use patterns. As a result, the TTI favors policies that stimulate automobile dependency and sprawl.
The Urban Mobility Report's claims about growing congestion do not correlate with other measures of travel times. Urban Mobility Report's estimates of congestion delay are inconsistent with real-time traffic data, and travel times reported in travel surveys.
Driven Apart recommends that urban transportation system performance be evaluated based on Hours of Peak Period Travel, which recognizes the time and fuel cost savings that result from more compact and mixed land use which reduces travel distances. It recommends a new approach to measuring urban transport system performance that reflects these elements:
1. Emphasize accessibility - the proximity and convenience of destinations - not just mobility.
2. Include comprehensive measures of land uses, trip lengths and mode choices as well as travel speeds.
3. Incorporate new and better data on travel speeds and commuting patterns.
4. Adopt an open, multi-disciplinary process to select, validate and continuously improve measures.
5. Provide measures that can be used to guide policy and evaluate investments rather than simply raise alarm about traffic delays.
TTI's Urban Mobility Report Flawed, Says Critic
The Texas Transportation Institute just released its 2010 Urban Mobility Report, which is a standard reference in the road-building industry -- and is seriously flawed, says Joe Cortright.
Maine Law Promotes Smart Growth
New state legislation encourages cities to plan around ‘smart growth’ principles to preserve farmland and open space, and use infill development to build more housing.
A Better Understanding of Smart Growth Benefits
Smart Growth creates compact, multimodal communities where residents consume less land, drive less, and rely more on non-auto modes. Planners have important stories to tell about the benefits of Smart Growth.
Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
Chicago’s Ghost Rails
Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.
Amtrak Cutting Jobs, Funding to High-Speed Rail
The agency plans to cut 10 percent of its workforce and has confirmed it will not fund new high-speed rail projects.
Ohio Forces Data Centers to Prepay for Power
Utilities are calling on states to hold data center operators responsible for new energy demands to prevent leaving consumers on the hook for their bills.
MARTA CEO Steps Down Amid Citizenship Concerns
MARTA’s board announced Thursday that its chief, who is from Canada, is resigning due to questions about his immigration status.
Silicon Valley ‘Bike Superhighway’ Awarded $14M State Grant
A Caltrans grant brings the 10-mile Central Bikeway project connecting Santa Clara and East San Jose closer to fruition.
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.
Caltrans
City of Fort Worth
Mpact (founded as Rail~Volution)
City of Camden Redevelopment Agency
City of Astoria
City of Portland
City of Laramie