September 18, 2017, 9am PDT
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.
September 2, 2017, 9am PDT
One artist capitalized on the quirks of Seattle's street grid.
December 11, 2016, 7am PST
Students at Emerson College live with the frustrations of the intersection of Boylston and Tremont streets everyday. They also have ideas for how to fix the intersection.
June 7, 2016, 8am PDT
Roundabout are gaining popularity in California and across the nation. While they have been shown to reduce crashes, not all are sold on the innovative concept, and when it comes to multi-lane roundabouts, cyclists have legitimate concerns.
April 12, 2016, 9am PDT
An MIT study determined that traffic lights, and their inefficiencies, could be eliminated if all vehicles were equipped to regulate their speed and "batch" together as they approach intersections.
October 26, 2015, 11am PDT
A MinnPost article explains the importance of a properly tuned turning radius while getting to the bottom of a controversial decision to remove pedestrian and bike infrastructure.
October 5, 2015, 10am PDT
The first protected intersection opened in August in Davis, Calif., a university town with the nation's highest percentage of bike commuters. Salt Lake City's new protected intersection is explained on NPR's "Here & Now" report with audio and videos.
July 1, 2015, 7am PDT
Local residents are upset with the effects of the placemaking installment in Chicago, opened this spring—namely slower traffic and a polka dot color scheme. An article in DNAinfo points out that slowing traffic was kind of the point.
June 5, 2015, 11am PDT
Although Los Angeles isn't famous for its walking culture, many neighborhoods are actually quite suited for it. That is, if streets could be made friendlier to the pedestrians they currently repel.
May 29, 2015, 9am PDT
Active Transportation Alliance, a Chicago pedestrian advocacy group, urges Mayor Rahm Emanuel to improve red light cameras rather than remove them. Despite complaints from drivers, well-advertised cameras can reduce pedestrian fatalities.
May 7, 2015, 1pm PDT
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.
April 16, 2015, 11am PDT
The intersection of Lincoln Ave, Southport Avenue, and Wellington Avenue in the South Lakeview neighborhood of Chicago is in the process of a major upgrade in pedestrian-friendly placemaking.
January 9, 2015, 1pm PST
Electrification of the Caltrain will be great for train riders, the environment, air quality, and public health, but it might worsen traffic congestion between San Jose and San Francisco by increasing the frequency of commuter trains.
October 20, 2014, 2pm PDT
Following the idea that pedestrian safety takes its cues from planners, Rachel Dovey's article on pedestrian safety lists six intersection designs that "actually prioritize pedestrians."
September 10, 2014, 7am PDT
Bike boxes, a European import, may not have received as much attention other novel bike facilities such as protected bike lanes, but they are spreading. Nashville's first bike box accompanies a road diet and buffered bike lanes.
January 10, 2014, 12pm PST
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.
January 27, 2013, 5am PST
Not usually regarded for their outside the box thinking, transportation engineers have nevertheless come up with some radical ideas for improving the flow of traffic and reducing the potential for collisions at busy intersections.
November 29, 2011, 5am PST
Alyse Nelson says that when it comes to placemaking, sometimes all you need is some brightly-colored paint.
June 13, 2011, 10am PDT
Chuck Wolfe focuses on the role of the urban corner, terming it "the central place of urban life".
January 16, 2011, 5am PST
Randal O'Toole points to a thesis paper that proposes a new approach to traffic flow at major intersections.