Transportation engineering PhD student Zhixia Li was attracted to the University of Cincinnati because of the real-world education and experience the university provides.
In return, he’s headed a real-world project that every driver can relate to. It’s a project on which he has presented and published nationally, and it looks at what he calls the “yellow light dilemma.” Are you, as a driver, more likely to stop or to speed through a yellow light?
Here’s what he found when conducting research, in cooperation with the Ohio Department of Transportation, at intersections in Akron, Cleves and Fairfield, Ohio: Certain factors make it more likely that you’ll opt to speed through an intersection rather than stop at the light.
The results of his research with his advisor Prof. Heng Wei, “Analysis of Drivers' Stopping Behaviors Associated with the Yellow Phase Dilemma Zone — An Empirical Study in Fairfield, OH,” will be presented at the 2010 American Society of Highway Engineers National Conference on June 9-13, 2010, in Cincinnati, at the Hilton Cincinnati Netherland Plaza.
So what are the factors that make us run the yellow? These includeLane position: Drivers in the right lane are 1.6 times more likely to speed through a yellow light as compared to drivers in the left lane.
Travel speed and speed limit: The greater the traveling speed of a vehicle at the onset of a yellow light, the more likely that vehicle is to pass through a yellow light. Another finding: the higher the posted speed limit, the more likely vehicles are to pass through a yellow light.
Timing of light: Yellow lights are typically set to persist between 3 to 5 seconds. Drivers coming upon an intersection where the yellow light persists longer are more likely to pass through the yellow light. For each “additional” second a yellow light persists, drivers are more than three times as likely to pass through an intersection. So, for example, a driver is more than three times as likely to pass through a yellow light set to persist for 5 seconds versus a yellow light set to persist for 4 seconds. Ditto for a yellow light that persists for 4 seconds versus a yellow light that persists for 3 seconds.
Li's research has won many awards, including the 2009 Institute of Transportation Engineers (ITE) Daniel B. Fambro Best Student Paper Award (one winner internationally); first place, 2009 ITE Great Lakes District Student Paper Competition (Great Lakes District includes Ohio, Indiana, Michigan, and West Virginia); and the 2009 Ohio Transportation Consortium (OTC) Best Graduate Student Paper Award.
This UC research will help traffic engineers consider and test safety and traffic efficiency measures, including the positioning of sensors that time traffic lights.
And it just might help drivers consider their own actions when in the yellow light dilemma zone.
Wendy Beckman | EurekAlert!
Multi-year study finds 'hotspots' of ammonia over world's major agricultural areas
17.03.2017 | University of Maryland
Diabetes Drug May Improve Bone Fat-induced Defects of Fracture Healing
17.03.2017 | Deutsches Institut für Ernährungsforschung Potsdam-Rehbrücke
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy