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

SF TDM measures

This report proposes a new approach to assessing and responding to land use-driven transportation impacts, called “modern mitigation.” Instead of relying on auto capacity improvements as a first resort, this approach builds on practice around transportation demand management (TDM) to make traffic reduction the priority. Based on programs dating to the 1990s in several cities, a modern mitigation program requires certain new land uses to achieve TDM credits. Read More >

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

Des moines parking

There are 83,141 households in the city of Des Moines, and 1.6 million parking stalls. Even allowing that some of those stalls are occupied by commuters, that’s a pretty staggering disparity. And even accounting for commuters, peak parking occupancy rates are only 65 percent downtown. These are some of the eye-opening findings from a new Mortgage Bankers Association report on parking supply in American cities. The report argues that localities should do their own parking inventories rather than rely on rules of thumb for parking needs and risk squandering resources. Read More >

Accessibility in practice (SSTI and Virginia Office of Intermodal Planning and Investment, 2017)

VirginiaBeach_jobs_transit_change_noLegend

Planning agencies and transportation decision makers often talk about the importance of improving access to destinations, but they rarely have the tools or resources to measure accessibility and incorporate those metrics into decision making. This report guides agencies through that process. Read More >


FEATURED RESOURCE

Connecting Sacramento

Connecting Sacramento is the first study to incorporate both accessibility analysis and tripmaking data, including data from multiple sources, and assess how they can be used together to guide transportation- and land use-related decisions. This study focused specifically on opportunities to improve first- and last-mile connections to light rail transit in Sacramento, but its findings are widely applicable. More Resources...

NEWS

Proximity to highways affects long-term school performance

A study from the National Bureau of Economic Research extends our knowledge of the effects of attending school near major roadways. Previous studies have found short-term effects on test scores, behavior, and school absences on days of poor air quality, but this new research shows that long-term school performance and test scores can be affected by attending school downwind of highways. Read More >

Overabundant parking fuels car-oriented living in greater Boston

A new report from the Metropolitan Area Planning Council reveals 30 percent of residential parking in the Boston area goes unused at night. This new study builds on an earlier report, featured in an SSTI webinar, growing the sample from 80 properties to 189 across 14 municipalities throughout the city’s inner core. The additional data also let MAPC test for significant factors affecting parking demand. MAPC estimates that the 5,910 empty spaces in their study represent $94.5 million in development costs, or roughly $5,000 per housing unit. Read More >

Invisible women

Research and design are based on a test case human who stands in for the broader population. The default human that is the basis for research and design projects is usually a white adult male. As a result, projects often come to conclusions that do not address the needs of women, and some that are outright dangerous. Transportation projects and priorities are not immune to this bias. Read More >

A new technique to identify deteriorating infrastructure using satellite data

With budgets that tend to favor new construction, many DOTs are finding it necessary to prioritize the most urgent repairs. But infrastructure decay is not always easily visible. And deferred or inadequate maintenance may occasionally have catastrophic consequences for U.S. bridges, 40 percent of which are at least 50 years old, and 9.1 percent of which are considered structurally deficient. A new remote sensing methodology may make the job of decay detection easier, and possibly more accurate. Read More >

Spending smarter: lessons and opportunities for state DOTs

Two states that are changing how transportation investments are prioritized were featured recently on an SSTI webinar. Virginia just funded a third round of projects under its Smart Scale program, while Hawaii piloted its own SmartTRAC program with help from SSTI and Smart Growth America. SSTI will soon be launching a new project to learn from these past experiences and guide future programs, and we invite interested agencies to reach out. Read More >

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