Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Video to keep traffic flowing

07.06.2005


Motorway Traffic Control Centres use a range of sensors for traffic surveillance and control. The shortcomings of one type, magnetic loop detectors, has led researchers to successfully develop algorithms for alternative video sensors.



“Loop detectors have a short life span of two to three years before they break,” explains project partner Jo Versavel, General Manager, Traficon, Belgium. “They are also very expensive to repair because they involve road closings. Another drawback is that they are unreliable in congested traffic situations.”

Loop detectors consist of one or more loops of wire embedded in the pavement and connected to a control box, activated by a signal ranging in frequency from 10 KHz to 200 KHz. They are used to supply data on vehicle passage, presence, count and occupancy. Video sensors send live information to a control centre. For example, if an accident occurs, the data is sent in real time, which allows for a quicker response, decreasing the wait on the road as well as the resulting congestion.


Video sensors have proven advantages over traditional loop detectors. However, video-based information calls for modifications or a complete re-design of existing loop-based surveillance or control algorithms. Before they can be used in new systems, the efficiency of video sensors had to be tested and measured against loop detectors.

The IST programme-funded RHYTHM project developed new algorithms for traffic surveillance and control that use video-based data and rigorously compared them with algorithms that use loop-based data. Project partners focused on three surveillance tasks (estimating and predicting traffic flows, queue-tail tracking and travel time estimates) and one control task (isolated traffic-responsive ramp metering).

RHYTHM’s surveillance and control algorithms were tested using a microscopic off-line simulation under a variety of different conditions. This was followed by a successful demonstration on two sites of a German motorway – Munich’s A92 for surveillance and A94 for control tasks.

The algorithms developed under RHYTHM proved “robust and innovative”, according to Versavel. “For example, the Alinea Algorithm was used to measure queue length on a ramp using video detection. This would allow traffic controllers to avoid a spill over of congestion onto local road networks,” he explains.

Plans to commercialise the system developed under RHYTHM are being drawn up by the Technical University of Crete.

Tara Morris | alfa
Further information:
http://istresults.cordis.lu/

More articles from Transportation and Logistics:

nachricht Tool helps cities to plan electric bus routes, and calculate the benefits
09.01.2017 | International Institute for Applied Systems Analysis (IIASA)

nachricht Realistic training for extreme flight conditions
28.12.2016 | Technical University of Munich (TUM)

All articles from Transportation and Logistics >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

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...

Im Focus: Tracing down linear ubiquitination

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...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

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...

Im Focus: Researchers Imitate Molecular Crowding in Cells

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...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Northern oceans pumped CO2 into the atmosphere

27.03.2017 | Earth Sciences

Fingerprint' technique spots frog populations at risk from pollution

27.03.2017 | Life Sciences

Big data approach to predict protein structure

27.03.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>