Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Model predicts motorway journey time reliability

17.04.2008
For car users and drivers of freight vehicles on motorways, being able to rely on the time taken to complete a journey is as important as the actual duration of the trip itself.

For that reason the Dutch Ministry of Transport, Public Works and Water Management has listed the improvement of the reliability of door-to-door journey times as one of the main objectives in its latest Mobility Memorandum.

PhD candidate Huizhao Tu has developed a model that can calculate the reliability of journey times and the effects traffic measures and the design of roads have on it. Tu will be awarded his doctorate on Tuesday 15 April 2008 on this subject at TU Delft in the Netherlands.

Motorway journey times can be rather unpredictable: one day everything will be fine, while the next, the traffic will be rock solid, even though the weather conditions and the quantity of traffic appear to be the same. For commuters and transporters the fact that journey times are so unpredictable is very annoying. Moreover, they factor this into their journey plans, and this leads to even more uncertainty about how long trips will take. Up to now, little was known about the mechanism that caused journey times to be so unreliable or the factors that played a role.

TU Delft PhD candidate Huizhao Tu has analysed journey time information covering several years for various motorways in the Randstad region. He found – naturally enough – that the busier the roads, the more unpredictable the journey time was. This aspect is important even where traffic intensity is far below the capacity of the road. Journey times are also unreliable on motorways with many junctions and on highways with short entrance and exit roads. It goes without saying that this too has an important influence on the predictability of journey times.

Huizhao Tu’s model calculates the effects of traffic measures (such as the closure of certain road sections and the introduction of maximum speed levels) and of the design of motorways (such as the length of entrance and exit roads) on the predictability of journey times. The model can therefore help contribute to improving the predictability of journey times.

Maarten van der Sanden | alfa
Further information:
http://www.tudelft.nl

More articles from Transportation and Logistics:

nachricht Artificial intelligence supports planning and control of car handling at ports
06.08.2020 | BIBA - Bremer Institut für Produktion und Logistik

nachricht Algorithms for optimized supply chains: Cost-effective ways to minimize risks in the supply chain
01.07.2020 | Fraunhofer Institute for Industrial Mathematics ITWM

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: ScanCut project completed: laser cutting enables more intricate plug connector designs

Scientists at the Fraunhofer Institute for Laser Technology ILT have come up with a striking new addition to contact stamping technologies in the ERDF research project ScanCut. In collaboration with industry partners from North Rhine-Westphalia, the Aachen-based team of researchers developed a hybrid manufacturing process for the laser cutting of thin-walled metal strips. This new process makes it possible to fabricate even the tiniest details of contact parts in an eco-friendly, high-precision and efficient manner.

Plug connectors are tiny and, at first glance, unremarkable – yet modern vehicles would be unable to function without them. Several thousand plug connectors...

Im Focus: New Strategy Against Osteoporosis

An international research team has found a new approach that may be able to reduce bone loss in osteoporosis and maintain bone health.

Osteoporosis is the most common age-related bone disease which affects hundreds of millions of individuals worldwide. It is estimated that one in three women...

Im Focus: AI & single-cell genomics

New software predicts cell fate

Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...

Im Focus: TU Graz Researchers synthesize nanoparticles tailored for special applications

“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.

Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...

Im Focus: Tailored light inspired by nature

An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.

Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“Conference on Laser Polishing – LaP 2020”: The final touches for surfaces

23.07.2020 | Event News

Conference radar for cybersecurity

21.07.2020 | Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

 
Latest News

Rare Earth Elements in Norwegian Fjords?

06.08.2020 | Earth Sciences

Anode material for safe batteries with a long cycle life

06.08.2020 | Power and Electrical Engineering

Turning carbon dioxide into liquid fuel

06.08.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>