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BVFF nummer:
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2012-003
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Projekttitel
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Variation of Vehicle Lateral Positioning According to Road Type and Lane Widht
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Projektledare/Kontaktperson
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Terry McGarvey
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Telefon
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013-204032
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Utförarorganisation
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VTI
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Medutförare
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Bakgrund
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Variation in vehicle lateral positioning has an effect on the rate of road pavement degradation. Investigation of accelerated degradation on 2+1 road types has indicated that vehicular position behaviour on this type of road does not correspond with behaviour on a normal road type. This could mean that existing pavement design shift factors, associated with road type and lane width, may in fact be inaccurate or inappropriate.
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Sammanfattning
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To be able to predict a road structures lifespan, it is necessary to know how traffic uses existing road space. This usage has a direct effect on the rate of surface wear, structural deformation and crack propagation, and varies depending on factors such as vehicle speed, lane width and road type.
Investigation of accelerated degradation on 2+1 road types has indicated that use of road space, on this type of road, does not correspond with behaviour on a normal road type. This could mean that existing pavement design shift factors used in TRVK Väg, associated with road type and lane width, are inaccurate or inappropriate.
In order to validate these shift factors, we must determine how vehicles actually utilise the road space available. A limited number of vehicle lateral position surveys have already been carried out during a previous project. The aim is to complement existing data with a new series of lateral position surveys. This will help build an understanding of vehicle positioning variation and road space usage on the different road types used in the Swedish road network.
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Förväntat resultat
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The results would show variations in vehicle lateral position for the different road types found in Sweden. The results would be used to verify existing shift factor values associated with lane width and road type. They would also be used to help develop new shift factor values for alternative road designs such as 2+1 and 1+1. The use of accurate pavement design shift factors would improve design effectiveness.
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Plan för resultatspridning och implementering
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Project results are likely to be of interest to the Swedish Road Administration (Trafikverket) and local road authorities (Sveriges Kommunar).
The results would be published in the form of a VTI report. The results would also be used to help verify existing design shift factor values associated with lane width and road type. They would also help develop new shift factor values for alternative road designs such as 2+1 and 1+1. This could in turn result in an improvement revision of TRVK Väg.
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Tidsramar
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