Randal O'Toole points to a thesis paper that proposes a new approach to traffic flow at major intersections.
Rebecca Lynn Haley, author of the study, defines the concept:
"Superstreets, also known as the restricted crossing u-turn (RCUT) by the Federal Highway Administration (FHWA), works by redirecting the side street left turn and through movements to a downstream, one-way median opening. Left turns from the major road can be accommodated by a u-turn maneuver after the intersection or by a left turn crossover at the main intersection."
Randal O'Toole concludes, from reading the report, that "...this greatly reduces both the time required for traffic signals to cycle and the number of conflict points between the two streets."
Diagrams of the traffic flow are available at The Antiplanner.
FULL STORY: Superstreets Relieve Congestion
On the Benefits of Traffic Signal Removal
Certain intersections stand to gain from losing their traffic lights. According to this study, cities can save money and improve safety by uninstalling signals in low-traffic zones.
Las Vegas Uses ‘Mini-Roundabout’ for Traffic Calming
Roundabouts, commonly used in other countries, are starting to catch on in U.S. cities. They can improve traffic flow and bring efficiency benefits.
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What drives the U.S. backlash to roundabouts — objectively safer and more efficient than stop-and-go intersections?
Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
San Francisco's School District Spent $105M To Build Affordable Housing for Teachers — And That's Just the Beginning
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The Tiny, Adorable $7,000 Car Turning Japan Onto EVs
The single seat Mibot charges from a regular plug as quickly as an iPad, and is about half the price of an average EV.
Seattle's Plan for Adopting Driverless Cars
Equity, safety, accessibility and affordability are front of mind as the city prepares for robotaxis and other autonomous vehicles.
As Trump Phases Out FEMA, Is It Time to Flee the Floodplains?
With less federal funding available for disaster relief efforts, the need to relocate at-risk communities is more urgent than ever.
With Protected Lanes, 460% More People Commute by Bike
For those needing more ammo, more data proving what we already knew is here.
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.
Smith Gee Studio
City of Charlotte
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
US High Speed Rail Association
City of Camden Redevelopment Agency
Municipality of Princeton (NJ)