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Uppföljning av vägars tekniska tillstånd: lägesrapport för observationssträckor ingående i det svenska LTPP-projektet till och med december 2020
Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance. VTI.ORCID iD: 0000-0002-0286-430X
2021 (Swedish)Report (Other academic)
Abstract [sv]

Målsättningen med projektet är att samla in, bearbeta och leverera högkvalitativa data som primärt är tänkt att användas för utveckling av modeller för tillståndsförändring av vägars tekniska tillstånd. 

Uppföljningen av observationssträckors tillstånd (100 meter långa) har på uppdrag av Trafikverket, tidigare Vägverket, pågått sedan år 1984. Inriktningen är i första hand fokuserad på den tillstånds-förändring som orsakas av tung trafik. 

Under årens lopp har antalet bevakade sträckor ändrats, vissa har utgått och andra tillkommit. Ombyggnationer med exempelvis riktningsseparering (mitträcke/vajer) är ett exempel på uteslutning ur programmet. 

I programmet ingår: 

Besiktning av samtliga aktiva sträckor. 

Beräkning av ett sprickindex för belastningsskador efter svårighetsgrad och utbredning per sträcka och besiktningstillfälle. 

Objektiv mätning av vägytans tillstånd utförs med vägytemätbil (Laser RST) c:a vart annat år. 

Fallviktsmätning (KUAB-FWD) utförs numera normalt på alla nya objekt som tillkommit samt året efter beläggningsåtgärd, alltid på hösten (september). 

Klimatdata hämtas från SMHI:s väderstationer (enligt ”Årstabellen”). 

Trafikdata för de aktiva sträckorna inhämtas från Trafikverket (normalt sker detta inom ett intervall om fyra år). 

Databas: 

Insamlade data bearbetas, kvalitetssäkras och samlas i en databas, den senast aktuella benämns LTPP-2020 (Microsoft Access 2007–2016). Den tillgängliga databasen innehåller både historiska data om sträckor som tagits ur bruk och nytillkomna som involverats på senare tid

Abstract [en]

The objective of this project is to collect and deliver high quality road data primarily for use in the development of performance prediction models. Monitoring of the LTPP (Long Term Pavement Performance) sections (100-metre-long) and their condition and change in condition started in 1984 on commission of the Swedish Road Administration. The aim is primarily to focus on road deterioration caused by heavy traffic. The project started with a limited amount of sections and have in 2020 increased to 698 sections distributed over 66 sites. All sections are part of the Swedish national road network. During the years, some sections have become redundant and therefore several replacement sections are included. Budget restrictions in 2000 resulted in a review of the sections and a 25 percent reduction in monitoring was implemented. Despite this decrease, the project purpose could still be maintained. By retaining the most strategically important routes and reducing the number of surveys useful high-quality data could still be obtained from the sections left in the monitoring program. In addition, the introduction of median barriers on some sections (to facilitate traffic separation) has meant a disqualification of suitability. At the start of 2021, 297 sections distributed over 33 sites will remain active.The following activities are included in the monitoring programme:• Distress surveys. Annual surveys are carried out by walking over the sections. During the survey, all distresses and surface defects are recorded. The grading of the distresses and defects are based on a national distress manual.• Calculation of an annual crack index. The index is calculated from the type of crack, crack distress grade and crack propagation and is included, in table form, in the database.• Road surface monitoring. Financial restrictions limit the monitoring to every second year. However, the development of rut and longitudinal unevenness follow a relatively linear trend, so monitoring every second year is considered acceptable in this case.• Measurement of the bearing capacity (KUAB-FWD). The capacity is measured on all new sections and after any maintenance measures.• Cross section profiling (PRIMAL profiling) is no longer carried out.• Collection of climate data from SMHI: s automatic weather observation stations.• Collection of traffic data normally every fourth year.• Quality control check of all collected data before being entered into the LTPP-2020 database (Microsoft Access 2007–2016).

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2021. , p. 40
Series
VTI resultat ; 2021:2
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:vti:diva-17093OAI: oai:DiVA.org:vti-17093DiVA, id: diva2:1597074
Available from: 2021-09-24 Created: 2021-09-24 Last updated: 2025-09-11Bibliographically approved

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Göransson, Nils-Gunnar

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