Cracking the upward GHG emissions curve in the transport sector has proved exceedingly difficult. Research from Aalborg University in Denmark suggests that in some industrialized societies this may be changing.
According to the International Energy Agency greenhouse gas emissions (GHG) from the transport sector have continued to rise in both the industrialized and industrializing countries, and are projected to continue to do so well into the 2030s and 2040s. One of the explanations for this is the strong network effects (path dependencies) associated with the system of car-based travel, where capacity expansions of the highway network induce further demand for higher automotive mobility.
Recent research from Aalborg University in Denmark suggests that, at least in the case of the Copenhagen and Portland, Oregon metropolitan areas, the existing system of dependence on high-carbon modes of transport may be weakening. Changes in demography, fuel prices, behavior, residential location preference, and environmental concerns are all contributing to a reduction in vehicle miles traveled (VMT) across North America and Europe, thereby undermining the business case for new large-scale transportation infrastructure projects such as the proposed Ring 5 in Copenhagen and the Columbia River Crossing project in Portland.
The path dependencies embedded within large-scale transportation infrastructure projects have dramatically different carbon trajectories, depending on the mode. If cities and regions are to meet their aggressive carbon reduction goals, then they will have to, sooner rather than later, begin to shift their strategic investment focus away from high carbon, motorized forms of travel toward low- or no-carbon modes of travel. Such decisions may become increasingly easier to implement in light of the decaying political support and economics of massive expansions of the road network.
FULL STORY: Breaking Carbon Lock-in: Path Dependencies in Large-Scale Transportation Infrastructure Projects
Pennsylvania Mall Conversion Bill Passes House
If passed, the bill would promote the adaptive reuse of defunct commercial buildings.
World's Largest Wildlife Overpass In the Works in Los Angeles County
Caltrans will soon close half of the 101 Freeway in order to continue construction of the Wallis Annenberg Wildlife Crossing near Agoura Hills in Los Angeles County.
U.S. Supreme Court: California's Impact Fees May Violate Takings Clause
A California property owner took El Dorado County to state court after paying a traffic impact fee he felt was exorbitant. He lost in trial court, appellate court, and the California Supreme Court denied review. Then the U.S. Supreme Court acted.
California Grid Runs on 100% Renewable Energy for Over 9 Hours
The state’s energy grid was entirely powered by clean energy for some portion of the day on 37 out of the last 45 days.
New Forecasting Tool Aims to Reduce Heat-Related Deaths
Two federal agencies launched a new, easy-to-use, color-coded heat warning system that combines meteorological and medical risk factors.
AI Traffic Management Comes to Dallas-Fort Worth
Several Texas cities are using an AI-powered platform called NoTraffic to help manage traffic signals to increase safety and improve traffic flow.
City of Costa Mesa
Licking County
Barrett Planning Group LLC
HUD's Office of Policy Development and Research
Mpact Transit + Community
HUD's Office of Policy Development and Research
Tufts University, Department of Urban and Environmental Policy & Planning
City of Universal City TX
ULI Northwest Arkansas
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.