Category Archives: Traffic and Traffic Control

Expanding road capacity in urban areas resulted in urban sprawl, more traffic and more motorists

By studying the effects of expanding road capacity in two urban areas in Norway; Ålesund (the Blindheim Tunnel) and Oslo (South Corridor), researchers found that the road capacity expansion resulted in urban sprawl, longer work trips and more traffic. The rush-hour congestion was not...

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Self-driving buses in Linköping part of the EU project SHOW

The benefits of self-driving vehicles for people with disabilities are one of the focus area for a recently launched EU project linked to self-driving buses in Linköping, Sweden. Two self-driving buses of different brands are in service in Linköping, Sweden, since late 2019. Together, they...

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Connected vehicles solve parking problems

Vehicles circulating in the city centre in search of a free parking space is a growing problem. A cloud service that tracks the traffic situation and the availability of free parking spaces could reduce both traffic and congestion. In a new study by VTI and the University of Skövde and other...

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Defining criteria that affect the importance and significance of cooperative road works warnings

Maintaining operability of the road network requires regular maintenance and improvement works, which can pose harm to traffic. A recent study produced background for an implementation and usage strategy for cooperative road works warnings in the Finnish road environment. Cooperative road works...

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Cherish the support for congestion charge

The introduction of a congestion charge in Stockholm had the intended effect of reducing congestion – even long term.  And after the introduction of the charges the public support steadily increased. This success story has attracted extensive interest from cities all over the globe.  However,...

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VTI launches new maritime research

VTI’s ambition is to create cohesive maritime research in areas such as transport economics, logistics, environment, behavioural science, and navigation. One current assignment concerns the validation of research in a major international EU-project, Sea Traffic Management. VTI’s maritime...

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Impacts of connected and automated driving on national road authorities’ policy targets

The main purpose of this article is to summarize state of the art on the impacts of connected and automated driving (CAD) on travel demand, travel behavior, traffic flow, safety and energy (reported in MANTRA deliverable D3.1). The review is based on ongoing and recently completed EU and national...

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How to make autonomous vehicles coexist with other traffic

The road infrastructure must be prepared for self-driving vehicles – especially in the beginning when the concepts are still new. Researchers are contributing to this through CoEXist, an EU-funded research project in which VTI participates as the largest partner. The gap between the rapid...

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Highway middle barriers substantially increase road safety

VTT Technical Research Centre of Finland investigated the safety effects of middle barriers on non-motorway highways in Finland. The results indicate that highway middle barriers greatly improve road safety and are particularly effective at reducing fatal accidents, with four in five such accidents...

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Experiences from automated enforcement in urban areas

Enforcement on the Finnish street network is facilitated by the police force’s latest surveillance equipment, which is better suited to urban environments. Speed control and combined speed and red light enforcement seem to improve road safety on the street network. Red-light enforcement alone is...

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