In California, where travel demand models often guide project-level decisions and analysis, a new report finds many are outdated, poorly documented, and ill-suited to the purposes agencies sometimes use them for. Transportation agencies rely on models to forecast traffic and guide billions of dollars in infrastructure investment. Without updates, these tools risk locking in old assumptions about growth and travel behavior rather than helping agencies plan for a more sustainable and efficient future.
demand management
Despite efficiency gains, rising travel demand pushes emissions higher
Advances in technology have made transportation more energy efficient in recent decades, lowering emissions per mile and per unit of freight. But according to a new study, those efficiency gains haven’t been enough to offset the rise in emissions from new transportation demand. To hold transportation emissions steady going forward, the study says, global transportation demand must not continue rising, or we must make a more dramatic shift toward electrification than currently imagined.
Small pricing signals can help cut traffic
Transportation agencies historically have sought to cut congestion by adding capacity. Alternatively, modest pricing signals could be more cost effective and efficient at managing demand, saving public agencies much more in the long run.
Sweden and Virginia: Messaging and variable tolls can influence mode choice
Two recent studies demonstrate two approaches to reducing driving. A Swedish study looked at what types of messages influence the choice to drive, while a report from Virginia shows that tolls on the I-66 corridor outside Washington have made a difference in both mode choice and when drivers travel.
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.
Estimating policy effects on reduced vehicle travel in Hawaii (SSTI, 2019)
Transcending Oil, released in April 2018, describes Hawaii’s path toward meeting its ambitious clean energy goals by 2045. The report was commissioned by Elemental Excelerator and prepared independently by Rhodium Group and Smart Growth America. It focuses mainly on transitioning the electrical grid to renewable energy while moving large numbers of vehicles to electric power but also points to the importance of managing overall travel demand through transportation policies and investments. This technical guide describes the methods and findings behind Transcending Oil’s travel demand forecasts, developed by SSTI and Smart Growth America.
Big data enables new tool for analyzing and diagnosing traffic congestion
StreetLight Data, which provides trip-making data from mobile devices and smartphone apps, has just launched a new interactive Congestion Analysis tool. The tool lets subscribers identify congested roads by time of day, break down the traffic in terms of trip length, trip purpose, and other characteristics, and then focus on specific strategies to relieve demand.
Growing a Culture of Transportation Sustainability in Massachusetts (McCahill, Ebeling and Codd, 2014)
MassDOT is among a growing number of state agencies tackling sustainability efforts in the transportaiton section and its approach offers valuable lessons for others. number of state agencies tackling this issue and its approach offers valuable lessons for others. This paper traces the evolution of MassDOT’s sustainability efforts, beginning with its revised Project Development and Design Guide, published in 2006, and ultimately encapsulated in its ongoing GreenDOT program, launched in 2010. These efforts represent the combined actions of state legislators, agency leaders, and personnel at all levels of MassDOT.
2013 Emerging Trends in Parking (International Parking Institute, 2013)
According to the results of a just-released survey, the United States is undergoing a parking revolution as the industry embraces a variety of new technologies that make it easier for people to find and pay for parking, and for parking authorities to better manage it.
The Innovative DOT: A Handbook of Policy and Practice (SSTI & SGA, 2012)
State officials across the country are facing the same challenges. Revenues are falling and budgets are shrinking while transportation demands grow. Most state Departments of Transportation (DOTs) have ambitious goals: improve safety, reduce congestion, enhance economic opportunity, improve reliability, preserve system assets, accelerate project delivery, and help to create healthier, more livable neighborhoods, just to name a few.
The handbook provides 31 recommendations transportation officials can use as they position their agencies for success in the new economy. The handbook documents many of the innovative approaches state leaders are using to make systems more efficient, government more effective and constituents better satisfied.