Featured Research

from universities, journals, and other organizations

'Organic' Traffic Lights Sense Traffic And Adjust Light Timing Accordingly

Date:
June 29, 2009
Source:
Inderscience
Summary:
Controlling road traffic in congested areas is difficult to say the least, a point to which any drive-time urban commuter might testify. An organic approach to traffic lights, might help solve the problem and avoid traffic jams and gridlock, according to new research.

Controlling road traffic in congested areas is difficult to say the least, a point to which any drive-time urban commuter might testify. An organic approach to traffic lights, might help solve the problem and avoid traffic jams and gridlock, according to research published this month in the International Journal of Autonomous and Adaptive Communications Systems.

According to Holger Prothmann of the Karlsruhe Institute of Technology, and colleagues there and at Leibniz Universitδt Hannover, Germany, so-called "organic" computing can model even very complex systems. In recent years, they explain organic computing has emerged as a possible solution to a wide range of problems involving complex, autonomous systems, that have sensors and controllers.

In the case of an urban traffic system, the sensors would be closed-circuit TV cameras mounted on road gantries and other places while the controllers, or actuators, would be traffic lights, which can effectively start and stop the flow of traffic.

Currently, traffic lights either have fixed timer controls or a centralised, control system. The widely used Split, Cycle and Offset Optimisation Technique (SCOOT) is popular with those responsible for traffic control. It computes a single cycle time for all intersections, splits this cycle time into green times for each intersection and then adjusts offset times in order to minimise waiting times. SCOOT's primary aim is keep traffic flowing smoothly and pedestrians safe. Modern traffic-responsive Urban Control (TUC) additionally takes public transport into account.

However, although these systems have been developed over many years, they do have several technical shortcomings and traffic jams do occur more frequently than drivers would like because problems with flow control. Fixed timers are obviously flawed as they do not respond to traffic itself and even centralised systems cannot respond optimally to the changes in traffic movements out on the roads. This leads to jams and waste drivers' time, vehicle fuel, and to higher levels of localised pollution in towns and cities than might otherwise be present.

"The environmental and economic importance of traffic control systems combined with the distributed nature of traffic nodes and their constantly changing traffic demands make traffic light control an ideal test case for organic computing approaches," explains Prothmann.

He and his colleagues have now used the organic computing approach to develop a decentralised traffic control system and compared its impact on traffic flow with a conventional system. "The organic approach is based on industry-standard traffic light controllers," Prothmann explains. These have been adapted to have an observer/controller architecture that allows the traffic light to respond to traffic flow and to pass on information to the other traffic lights on neighbouring roads.

Tests at busy junctions in Hamburg, have demonstrated that the average number of vehicle stops can be cut significantly, delays avoided, and journey times reduced, all of which has benefits for drivers, pedestrians and city dwellers, and, in terms of fuel use and pollution, the environment.

 


Story Source:

The above story is based on materials provided by Inderscience. Note: Materials may be edited for content and length.


Journal Reference:

  1. Organic traffic light control for urban road networks. Int. J. Autonomous and Adaptive Communications Systems, 2009, 2, 203-225

Cite This Page:

Inderscience. "'Organic' Traffic Lights Sense Traffic And Adjust Light Timing Accordingly." ScienceDaily. ScienceDaily, 29 June 2009. <www.sciencedaily.com/releases/2009/06/090626140130.htm>.
Inderscience. (2009, June 29). 'Organic' Traffic Lights Sense Traffic And Adjust Light Timing Accordingly. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2009/06/090626140130.htm
Inderscience. "'Organic' Traffic Lights Sense Traffic And Adjust Light Timing Accordingly." ScienceDaily. www.sciencedaily.com/releases/2009/06/090626140130.htm (accessed April 23, 2014).

Share This



More Matter & Energy News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

UN Joint Mission Starts Removing Landmines in Cyprus

UN Joint Mission Starts Removing Landmines in Cyprus

AFP (Apr. 23, 2014) — The UN mission in Cyprus (UNFICYP) led a mine clearance demonstration on Wednesday in the UN-controlled buffer zone where demining operations are being conducted near the Cypriot village of Mammari. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Air Force: $4.2B Saved from Grounding A-10s

Air Force: $4.2B Saved from Grounding A-10s

AP (Apr. 23, 2014) — Speaking about the future of the United States Air Force, Chief of Staff Gen. Mark Welsh says the choice to divest the A-10 fleet was logical and least impactful. (April 23) Video provided by AP
Powered by NewsLook.com
Jets Fuel Jump in Boeing's Revenue

Jets Fuel Jump in Boeing's Revenue

Reuters - Business Video Online (Apr. 23, 2014) — A sharp rise in revenue for commercial jets offset a decline in Boeing's defense business. And a big increase in deliveries lifted profitability. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Is North Korea Planning Nuclear Test #4?

Is North Korea Planning Nuclear Test #4?

Newsy (Apr. 22, 2014) — South Korean officials say North Korea is preparing to conduct another nuclear test, but is Pyongyang just bluffing this time? Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins