The diverging diamond interchange system planned for an exit off Interstate 70 in Grand Junction, west of Denver in Colorado, has been delayed so officials can educate the public about the new traffic pattern.
Grand Junction officials had hoped to open a new diverging diamond configuration for Exit 26 on Interstate 70 on December 17, but those plans have been pushed until this spring so transit officials can go to greater lengths to educate the public about the new traffic pattern, which attempts to limit left turns and the deadly "T-Bone" accidents that are common in such intersections.
Grand Junction's engineering manager Trent Prall is quoted in the article: “We thought that opening it during the winter season and in the middle of the holiday season was not the best opportunity for success for the project.”
The article by Monte Wall also describes the function of the innovative intersection system: “The configuration is unique because it eliminates traditional left-hand turns by crossing lanes and shifting drivers to the left side of the road…Designers say this gives drivers direct access to a left-hand interstate on-ramp without waiting at a traffic signal.” The interchange configuration has benefits in safety and capacity.
FULL STORY: Western Slope "diverging diamond" on-ramp delayed to better ready drivers
On the Rise of the Diverging Diamond Interchange
Its design can appear baffling at first, but the DDI presents drivers with far fewer opportunities to collide with each other than traditional four-way intersections.
San Mateo Formally Opposes Freeway Project
The city council will send a letter to Caltrans urging the agency to reconsider a plan to expand the 101 through the city of San Mateo.
Disconnecting Communities: Measuring the Social Impacts of Freeways
Research from 50 major U.S. cities shows social connections are weakest in neighborhoods where highways are present.
Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
Canada vs. Kamala: Whose Liberal Housing Platform Comes Out on Top?
As Canada votes for a new Prime Minister, what can America learn from the leading liberal candidate of its neighbor to the north?
The Five Most-Changed American Cities
A ranking of population change, home values, and jobs highlights the nation’s most dynamic and most stagnant regions.
Rethinking Computing: Researchers Tackle AI’s Energy Demands
USC researchers are reimagining how AI systems are trained and powered — through smarter algorithms, innovative hardware, and brain-inspired designs — to dramatically reduce computing’s energy footprint.
Amazon-Owned Robotaxis to Begin Testing in LA
Los Angeles will become the sixth city where Zoox is testing its autonomous vehicle technology.
New York MTA Says No More Borrowing, Will Cut Costs Instead
The agency says it won’t take out any new loans to finance its planned improvements and is finding other ways to cut costs.
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.
New York City School Construction Authority
Village of Glen Ellyn
Central Transportation Planning Staff/Boston Region MPO
Institute for Housing and Urban Development Studies (IHS)
City of Grandview
Harvard GSD Executive Education
Regional Transportation Commission of Southern Nevada
Toledo-Lucas County Plan Commissions