Category Archives: Infrastructure

New climate-proof solutions for hard surfaces

High-density road infrastructure that emphasise maximum durability and minimum maintenance create inflexible systems, which put increased stress on urban trees and lead to increased risk for flooding. Over the past five years, the ‘Climate-proof solutions for urban surfaces’ project...

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How can high levels of particles in tunnels be reduced?

Traffic jam in a road tunnel.
A new study from the National Road and Transport Research Institute (VTI) demonstrates that older types of trains produce more particulate emissions in railroad tunnels than do newer ones. Dust binding, improved paving, and reduced studded tyre use could reduce coarse particle levels in road...

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Nordic capitals are prioritising pedestrians

Street with people in Stockholm
Helsinki, Stockholm and Copenhagen are all working strategically with pedestrian prioritising and urban life. Car free city centres are high on the political agenda in many Nordic cities and in a range of European countries. New policy measures are applied and in many cases, significant...

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Trend towards fewer parking spaces

Parking space
Research demonstrates that it is possible to predict the need for parking in connection with renovations and new construction. At the same time, there is a trend towards cities, for example, eliminating street parking and instead using the land for cycling paths, as is the case in Stockholm and...

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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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