Transportation agencies in the U.S. spend billions of dollars each year expanding highways to ease gridlock. Yet commute times have increased 20% over the last 50 years and traffic congestion is still worsening, according to a several reports. New research confirms congestion pricing may be the best path toward any kind of relief. New York’s program, which launched in January amid plenty of controversy, looks like a promising example.
Demand Management
Advanced models can’t replace sound judgment
The investments made by transportation agencies are often guided by increasingly sophisticated models and forecasts, which strive to account for more factors and become more accurate in predicting travel patterns. These improvements, while promising for the future, also highlight the many ways that most agencies’ existing models miss the mark. Values-based decision-making can help agencies achieve the outcomes they have set out in their long-range plans more effectively than relying on models alone.
Safer infrastructure can drive a surge in cycling
Acknowledging that highway investments drive up car use and traffic, transportation professionals and advocates have grown more interested in accounting for induced demand in transportation investments. But the laws of induced demand are not limited to highways. As several cities have shown, investing in bicycle infrastructure can increase bike use by 100% or more.
USDOT could advance travel modeling and help planners account for induced demand
A provision of the Bipartisan Infrastructure Law (Sec. 11205) requires USDOT to review existing travel demand models and, among other things, consider the potential implications of induced travel. Federal officials, committed to that mandate, were at the TRB annual meeting last week to learn from modeling experts and practitioners. This blog post offers one perspective on the issues and lays out several opportunities gleaned through discussions at TRB.
Adding road capacity is fruitless, another study finds
As cities grow and traffic increases, road capacity investments offer diminishing returns and even make traffic worse, according to a recent international study. Looking at 24 cities across the globe, researchers found that for every one-percent increase in road capacity, average traffic speeds drop 0.014 percent. Public transportation doesn’t suffer the same consequences.
Researchers warn traffic studies could face more legal scrutiny
Local governments often rely on traffic impact analyses to review and approve projects, charge impact fees, and ask developers to go above and beyond the basic requirements. These traffic studies, however, are often based on “junk science,” and may not hold up in courts much longer, according to a new Viewpoint article published in the Journal of the American Planning Association.
Congestion pricing impacts people differently depending on their income
High-income travelers pay the bulk of congestion pricing fees, according to a new UK study. Others tend to change their travel behavior and would benefit from better travel options.
Remote work could increase driving and transportation emissions
The impacts of telecommuting often come up in SSTI’s work around travel demand management and climate action plans, so our team makes a point of staying on top of the latest relevant research. Although the pandemic showed us that remote work helped cut traffic considerably, especially in major job centers, the verdict is still out on whether widespread telecommuting could really help lower travel demand. A growing number of studies suggest it could have the opposite effect.
Micromobility in Cities, A History and Policy Overview (National League of Cities, 2019)
Bike sharing—both docked and undocked, manual and electric-assist—plus kick and electric scooters have become commonplace in cities across the U.S. But best practices are still emerging, and cities are often not sure if these new micromobility devices will bring positive or negative consequences to their transportation system and neighborhoods. The National League of Cities has provided a history of the rise of micromobility, a guide for what cities should think about as they move forward with regulation and policy, and finally case studies from across the country.
How and Where Should I Ride This Thing? “Rules Of The Road” for Personal Transportation Devices (Mineta Transportation Institute, 2019)
The Mineta Transportation Institute surveyed various levels of government—cities, states, and college campuses— as well as conducted personal interviews with stakeholders, to detail how jurisdictions are regulating electric and kick scooters, skateboards, e-skateboards, hoverboards, Segways, and rollerblades. They then recommended model state laws to bring some standardization to the use of these personal transportation devices.