Category Archives: Maintenance

Safety is key when Finns choose winter tyres

VTT Technical Research Centre of Finland Ltd. investigated motorists’ criteria for winter tyre choices. The results of a nationwide survey showed that traction on ice was the most crucial tyre feature, especially for motorists using studded tyres, whereas for users of studless winter tyres, the...

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Non-native plant species spread via transport systems

Lupins
Researchers at the Swedish National Road and Transport Research Institute, VTI, have compiled a report on non-native invasive plant species in Sweden and how they spread via transport systems. An invasive species is a non-native animal or plant species that has been introduced into an...

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Testing unmanned aircraft for roadside snowpack avalanche evaluation

Can unmanned aircraft systems (UAS) support the Norwegian Public Roads Administration’s (NPRA) mission to monitor snow avalanche hazards above their roads? NPRA staff recognized that UASs (often called drones) could reduce the need for avalanche staff to travel to dangerous avalanche zones and...

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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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Road dust sampling equipment exported

The ability to sample and analyse road dust amounts and properties is vital to the effort to reduce levels of hazardous particles in our ambient air. The Swedish National Road and Transport Research Institute (VTI) has been performing such sampling for many years using the wet dust sampler (WDS),...

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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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Bringing Together Nordic Expertise in Cooperation on Road Dust

City traffic in winter
Road dust can be cleaned up or bound to the road surface, but more knowledge is needed to determine which approach is more effective. Project Nordust is consequently starting as a Nordic cooperative initiative in which researchers from Sweden, Iceland, Finland, and Norway will work together to...

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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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Sweep-salting in Karlstad: Challenges and opportunities

Sweep salting bicycle paths
The Swedish National Road and Transport Research Institute (VTI) has analysed the conceivable advantages and disadvantages of sweep-salting bicycle paths in Karlstad, a seaside town in Sweden with an estimated 90,000 inhabitants. The town’s location and climate make sweep-salting a good method...

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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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