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Samband mellan vägytans kvalitet och fordonshastigheter

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I denna studie skattar vi effektsamband mellan vägytans kvalitet och fordonshastigheter. Vi använder ett datamaterial som består av ca 1,9 miljoner hastighetsobservationer på det svenska vägnätet under åren 2012 till 2018, samt information om vägytans tillstånd, vägegenskaper och väder. Resultaten visar att längsgående ojämnheter (mätt via International Roughness Index, IRI) innebär betydande hastighetssänkningar, där exempelvis fordonshastigheten sjunker från 70 till 47 km/h när IRI ökar från 1 till 11 mm/m. Även tvärgående ojämnheter (spårdjup), samt ytskador i form av ökad megatextur och makrotextur påverkar fordonshastigheterna negativt. Resultaten indikerar större hastighetssänkningar jämfört med tidigare studier på svenska vägdata. Ett viktigt bidrag är de skattade sambanden för vägar av sämre kvalitet, då det är främst dessa vägar som är aktuella för reinvesteringsåtgärder. Med exempelberäkningar visar vi de restidseffekter våra effektsamband innebär och därmed vilka restidsvinster en reinvesteringsåtgärd kan skapa.

Suggested Citation

  • Odolinski, Kristofer & Nilsson, Jan-Eric, 2020. "Samband mellan vägytans kvalitet och fordonshastigheter," Working Papers 2020:5, Swedish National Road & Transport Research Institute (VTI).
    • Handle: RePEc:hhs:vtiwps:2020_005
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    Keywords

    Vägyta; Fordonshastighet; IRI; Spårdjup; Megatextur; Makrotextur;
    All these keywords.

    JEL classification:

    • R41 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Transportation Economics - - - Transportation: Demand, Supply, and Congestion; Travel Time; Safety and Accidents; Transportation Noise
    • R42 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Transportation Economics - - - Government and Private Investment Analysis; Road Maintenance; Transportation Planning

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