Roadway Design

Multimodal geometric design
Article August 16, 2017
Roadway and highway designers have been increasingly turning from dimensional-based, three-dimensional geometric design criteria to performance-based analysis approaches. Historical approaches of using vehicular capacity and meeting nominal design criteria are giving way to multimodal solutions...
Hollywood Blvd

The Vision Zero Action Plan in Los Angeles aims to not only eliminate traffic deaths for motorists, but also for pedestrians and cyclists by concentrating efforts on areas with more vulnerable populations.

Article August 08, 2017
According to the National Highway Traffic Safety Administration, the year 2015 marked the end of a five-decade trend of declining traffic fatalities by showing a 7.2% increase over 2014.   This trend also was seen in the city of Los Angeles, which exhibited one of the highest collision death rates...
Detroit street lights

Image: College for Creative Studies in Detroit

Article August 08, 2017
The future is looking bright for the city of Detroit, and much of that optimism is due to the recent installation of 65,000 modern, efficient and reliable light-emitting diode (LED) streetlight fixtures that are casting the Motor City in a new light.   “I can remember a few years ago driving down...
News July 06, 2017
The San Francisco Municipal Transportation Agency (SFMTA) is looking to add their red transit-only lanes to at least 50 new streets in the region, as newly granted federal approval will now allow the agency’s red lanes to spread to more areas across the city.   A list of “Potential Future Red Lanes...
Article May 31, 2017
28th and Hoyt.   The neighborhood greenway system in Portland, Ore., forms the backbone of the city’s renowned bicycle network. The idea is simple: Select a quiet residential street parallel to a bustling arterial and enhance it to create a pleasant yet efficient cycling environment that appeals...
News May 16, 2016
Georgia transportation officials are studying how to add semi-only lanes for truck traffic on Interstate 75 between Macon and Atlanta's southern suburbs.   State officials have yet to decide how to schedule the semi-only lanes and other big initiatives over the next 10 years, according to Georgia...
News March 17, 2016
Every 1,118th intersection in the U.S. is a roundabout, compared to France where at every 45th intersection motorists can expect to encounter the curved intersection. Research by the American Insurance Institute for Highway Safety found that roundabouts reduce injury by 75%.   The Washington...
News December 08, 2015
Bicycles are gaining ground in the state of Iowa after six complete street projects were awarded a combined $75,000 in grants. The complete street projects and the amount of funding received by each, administered through the Des Moines Area Metropolitan Planning Organization, breaks down as follows...
News May 26, 2015
Bertha, the plagued tunnel-boring machine at the Alaskan Way Viaduct replacement project in Seattle, has been dismantled and has revealed more damage than was expected.   Grit made its way into the rubber bearing seals, steel casings around the seals broke apart and pinion gears and the teeth that...
Article October 08, 2014
    At signalized intersections, daily fluctuations in demand can be handled by the amount of green time allocated to the movement.   As traffic increases over time and the demand cannot be handled by signal-timing changes, the resulting congestion can be handled by adding lanes to the problematic...
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