Category Archives: Infrastructure

Unmanned Aircraft for Roadside Avalanche Monitoring

Unmanned aircraft
The Norwegian Public Roads Administration (NPRA) recognizes that unmanned aircraft systems (UAS) are increasingly capable and potentially can replace the use of helicopters for avalanche monitoring, but there are challenges for the use of these. The NPRA has an active maintenance program...

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Research Station with a Focus On the Environment

Illustration of Testsite E18
There is only one permanent environmental and road research station in Sweden, situated on the E18 motorway between Västerås and Enköping. VTI is now taking over as the new research coordinator for the station. “Here we can follow up on the various types of environmental effects that...

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Winter Driving and Lack of Experience Cause Accidents

Lorry seen from the side.
Foreign drivers of heavy goods vehicles (HGVs) in Norway have three times the risk of being involved in a single vehicle accident than drivers of domestic HGVs. A recent study uses several methods to examine safety outcomes, risk factors and measures associated with increasing...

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The Right Vegetation Can Contribute to a More Forgiving Traffic Environment

Vegetation in city.
The biggest source of air pollution in cities is traffic, and the right type of vegetation can result in better air, particularly if it is growing near traffic. However, there is a key factor that a municipality should take into account before putting the plants in the ground, namely, traffic...

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Properly Placed Vegetation in Cities Improves Air Quality

Vegetatation in city environment.
A city’s vegetation can affect its air quality both positively and negatively. The positive effect is that the total amount of air pollution decreases because the air is being filtered. On the other hand, vegetation in crowded street canyons can degrade the air locally if deployed in such a way...

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A Future Without Traffic Signals?

Traffic lights at intersection
Neither traffic signs nor traffic signals may be necessary if all vehicles are self-driving. But many questions remain as to what will be required in the future, which is why the Swedish National Road and Transport Research Institute (VTI), Linköping University (LiU), and the Royal Institute of...

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Gothenburg Celebrates 400 Years in the Air

Artist’s renditions of cableway from the City of Gothenburg.
Upon turning 400, Gothenburg intends to celebrate by completing a cableway that spans the Göta River. Thousands of people are expected to make their daily commute on the cableway. The idea of a cableway for public transport was presented in detail at Transportforum in Linköping. Travel in...

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Smart Paving Choice Reduces Energy Consumption

Close-up of road structure.
All approaches to reducing carbon dioxide emissions are welcome, and one of them might be to reduce the rolling resistance of the pavement. Different pavements offer different levels of resistance, which means that they can affect vehicle fuel consumption. One approach is to reduce the...

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The Handbook of Road Safety Measures – Now in Portuguese

Michael W.J. Sørensen with the newly presented handbook translated to Portuguese
The newest edition of the “Handbook of Road Safety Measures” has been published in Portuguese and was released during the “Second Global High Level Conference on Road Safety” in Brazil on November 17, 2015. The Institute of Transport Economics in Norway has written the Handbook of...

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Research Moving Forward into Skid-free Pedestrian and Bicycle Paths

Many initiatives are currently underway around Sweden intended to make it safer to move around outdoors in winter and increase the proportion of trips by bicycle or on foot. However, nearly all our knowledge of winter road maintenance derives from the maintenance of airports and vehicle roads in...

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