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

License-plate readers pose threats to equity and privacy

Automated license-plate readers and associated software have become inexpensive go-tos for law enforcement and toll collection. They also raise questions about equity and ethics. Axon Enterprises, a vendor of law-enforcement cameras and other devices, has set up an ethics board to consider such questions. Read More >

Nighttime pedestrian fatalities soar

While other crash types have gone down, pedestrian and bicycle crashes continue to rise, and crashes happening at night account for 90 percent of the increase in pedestrian fatalities in the last ten years. A recent article asks, “Why?” but comes to no definitive conclusion. The authors cites possible factors for the rise in nighttime pedestrian fatalities: A general increase in people walking and biking for transportation, larger vehicles such as SUVs are more deadly to those outside the vehicle; more people are working at night; and new autonomous technologies do not do well detecting pedestrians, especially in low-light conditions. One factor not mentioned in the article is the number of lighted devices now in vehicles, but research in this area appears to be slim. Read More >

Is there bias in GPS enabled smartphone cycling app data?

Smartphones with GPS tracking ability are capable of collecting large amounts of pedestrian and cyclist movement data. But do tracking apps developed largely for athletic or route-planning use capture the big picture of where pedestrians and cyclists travel and what infrastructure they use? The answer, according to a new study in the Journal of Transport & Health, is “no.” These apps miss data from segments of the cycling population, as well as information about the usage of particular kinds of infrastructure by riders with particular characteristics. Read More >

Residential exposure to local traffic emissions associated with higher risk of stroke

A recent study finds that long-term residential exposure to locally emitted black carbon—primarily from traffic exhaust—is associated with higher stroke incidence. BC comprises a significant portion of particulate matter. Although BC is a known health hazard with health effects that are especially pronounced in populations in dense urban areas, the U.S. does not currently include it as a separate criteria pollutant in its National Ambient Air Quality Standards. Read More >

Priced parking is fair and effective at lowering car use

New research out of California looks at the effect of priced parking on commuter mode choice and transportation costs for low-income households. Findings from two studies suggest raising the price of commuter parking by 10 percent could lower car use by as much as three percentage points and, while residential parking permits could hit low-income households hardest, few households would be disproportionately affected. Moreover, revenues from paid parking could offset any potential burden. Read More >

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