Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Stop or Speed Through a Yellow Light? That Is the Question

09.06.2010
Engineering graduate student Zhixia Li was attracted to UC 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: the "yellow light dilemma." Are you, as a driver, more likely to stop or speed through a yellow light?

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 include

Lane 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.
Type of vehicle: Drivers in heavy trucks are more likely to “pass through” a yellow light versus drivers of automobiles, SUVs, vans or pickup trucks.

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!
Further information:
http://www.uc.edu

Further reports about: Transportation stop traffic engineers traffic lights yellow light

More articles from Studies and Analyses:

nachricht New study from the University of Halle: How climate change alters plant growth
12.01.2018 | Martin-Luther-Universität Halle-Wittenberg

nachricht Disarray in the brain
18.12.2017 | Universität zu Lübeck

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Let the good tubes roll

19.01.2018 | Materials Sciences

How cancer metastasis happens: Researchers reveal a key mechanism

19.01.2018 | Health and Medicine

Meteoritic stardust unlocks timing of supernova dust formation

19.01.2018 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>