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)


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 >


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...


Ecommerce fulfillment centers increasing freight pollution, congestion in rural towns

In order to keep up with ever-increasing ecommerce demand, companies such as Amazon are building sprawling new fulfillment centers on the outer edges of major U.S. metro areas to aid in their logistical operations. While these warehouses can provide a windfall in economic development for the rural towns where they are being constructed, a recent article found that, increasingly, communities are finding these facilities are more trouble than they’re worth. Specifically, the jobs and tax revenue being generated don’t outweigh negative impacts caused by freight pollution and traffic congestion. Read More >

A systemic approach to pedestrian safety analysis

The rise in pedestrian fatalities over the last decade has alarmed DOTs and local planning organizations. However, the methodologies used to identify locations for improvements have continued to use the “hot spot” approach, where agencies focus on specific locations with historically high crash incidents, making this approach reactive rather than proactive. NCHRP recently released a guidebook that outlines a systemic approach for proactively identifying high risk zones and prioritizing countermeasures. Read More >

Gas stations venting ten times more gas vapor than once believed

Exposure to the chemicals contained in gasoline vapor poses serious risk to human health. Technologies have been implemented to reduce the amount of gasoline vapor released along the supply chain and during the routine fueling of vehicles. The evaporative loss during storage has been largely under-addressed, due to the perception that the quantity lost is fairly small. New research reveals that vent-pipe-emissions from underground storage tanks may be an order of magnitude higher than previously believed, and that people in proximity to these vents may experience an elevated exposure risk. Read More >

Utah lowers BAC limit; majority of Americans support stricter limits

At the end of December, Utah will lower the legal blood alcohol content (BAC) limit for driving from 0.08 to 0.05 percent, the lowest in the nation. While a survey shows a majority of Americans back this change, simply lowering the limit and assuming the problem will go away is not the end of the story. Read More >

Accessibility analysis highlights transit deficiencies in New Orleans

The average transit user in New Orleans can access only a fraction of the opportunities that drivers can, according to a local advocacy group, and recent transit investments aren’t helping much. The group, Ride New Orleans, just released its annual State of Transit 2018 report, which includes an analysis of the number of jobs accessible by car and by transit within 30 minutes. They found that the average transit user can only reach 12 percent of the region’s jobs within 30 minutes, compared to 89 percent for drivers. Read More >

More News...