Automated crack measurement test in Finland 2004
The Finnish Road Administration (Finnra) organized in 2004 a test for automated crack measuring systems. The goal was to get a concrete experience from the existing measurement systems. The test sites were chosen from typical low volume roads in Southern Finland. The total length of measured test sites were 100 km asphalt roads, soft asphalt roads, road with under and over 7 m with different type of cracks. Finnra is conducting each year 10 000 km of manual crack inventory with methodology called PVI. All test sites were measured manually (according to the PVI methodology) in normal production type measurement in May 2004 and second time in July 2004. Finnra was able to get two service providers to the test: 1. Ramboll RST, with system Laser RST PAVUE, version 13; 2. Finnish Road Enterprise, with system from Adhara Inc, version 1 and UniAnANALYZE software. The data from test objects consists for each methodology: (a) Two measurement run, (b) Measurement observation for each 100 m section; (c) Measurement observation for each 10 m section; (d) Reference material as front video at low speed; Material from Ramboll RST for object level analysis. The crack variables in the test were chosen and provided by service providers: Existing PVI variable "Vauriosumma, VS", "Cracked Surface Index, CS" provided by Ramboll RST and "Unified Crack Index, UCI" provided by Finnish Road Enterprise. When the results are used to present the condition distribution of the network or the differences of condition on different roads the quality of automated measuring systems was good. If the road is cracked, both systems could record that automatically. Repeatability of the results was clearly best with the Ramboll RST's system. There exist a lot of possibilities to develop a common definition for different cracks in co-operation with other road administrations. The conclusions from the test in Finland 2004 were: New measurement methodologies provide increased data quality; Location of crack in lane is an important new information about cracking; New methodology provides good possibilities to develop new crack variables for different purposes. The recommendation is that Finnra should change the crack inventory methodology as soon as possible to automated measurement. This report may be found at http://alk.tiehallinto.fi/julkaisut/pdf/3200917e-apvmtest_report.pdf
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/9518034435
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Authors:
- AIJO, J
- Publication Date: 2005
Language
- English
Media Info
- Pagination: 62p+5app
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Serial:
- TIEHALLINNON SELVITYKSIA, FINNRA REPORTS
- Volume: TIEH 3200917E
- Issue Number: 5/2005
- Publisher: Finnish Road Administration
- ISSN: 1457-9871
Subject/Index Terms
- TRT Terms: Automation; Cracking; Measurement; Pavements
- Geographic Terms: Finland
- ITRD Terms: 3882: Automatic; 5211: Cracking; 8035: Finland; 6136: Measurement; 2955: Pavement
- Subject Areas: Highways; Maintenance and Preservation; Pavements; I61: Equipment and Maintenance Methods;
Filing Info
- Accession Number: 01011831
- Record Type: Publication
- Source Agency: TRL
- ISBN: 951-803-443-5
- Files: ITRD, ATRI
- Created Date: Dec 20 2005 11:24AM