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Infrared Thermometry in Winter Road Maintenance
Mid Sweden Univ, Östersund, Sweden.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Environmental Geochemistry and Ecotechnology.
2012 (English)In: Journal of Atmospheric and Oceanic Technology, ISSN 0739-0572, E-ISSN 1520-0426, Vol. 29, no 6, 846-856 p.Article in journal (Refereed) Published
Abstract [en]

There is significant interest among road authorities in measuring pavement conditions to perform appropriate winter road maintenance. The most common monitoring methods are based on pavement-mounted sensors. This study's hypothesis is that the temperature distribution in a pavement can be measured by means of a nonintrusive method to retrieve the topmost pavement temperature values. By utilizing the latest infrared (IR) technology, it is possible to retrieve additional information concerning both road temperatures and road conditions. The authors discovered that surface temperature readings from IR sensors are more reliable than data retrieved from traditional surface-mounted sensors during wet, snowy, or icy road conditions. It was also possible to detect changes in the road condition by examining how the temperatures in wheel tracks and in between the wheel tracks differ from a reference dry road condition. The conclusion was that nonintrusive measurement of the road temperature is able to provide an increase in relation to the knowledge about both the road temperature and the road condition. Another conclusion was that the surface temperature should not be considered as being equal to the ground temperatures retrieved from traditional surface-mounted sensors except under conditions of dry, stable roadways.

Place, publisher, year, edition, pages
2012. Vol. 29, no 6, 846-856 p.
Keyword [en]
Temperature, Model
National Category
Environmental Engineering
URN: urn:nbn:se:kth:diva-98942DOI: 10.1175/JTECH-D-11-00071.1ISI: 000305272100007ScopusID: 2-s2.0-84864765461OAI: diva2:540703

QC 20120711

Available from: 2012-07-11 Created: 2012-07-05 Last updated: 2012-11-16Bibliographically approved
In thesis
1. Measurements for winter road maintenance
Open this publication in new window or tab >>Measurements for winter road maintenance
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Winter road maintenance activities are crucial for maintaining the accessibility and traffic safety of the road network at northerly latitudes during winter. Common winter road maintenance activities include snow ploughing and the use of anti-icing agents (e.g. road salt, NaCl). Since the local weather is decisive in creating an increased risk of slippery conditions, understanding the link between local weather and conditions at the road surface is critically important. Sensors are commonly installed along roads to measure road weather conditions and support road maintenance personnel in taking appropriate actions. In order to improve winter road maintenance, more precise information about road surface conditions is essential. In this thesis, different methods for estimation of road weather are developed, discussed and tested. The methods use the principles of infrared thermometry, image analysis and spectroscopy to describe ice formation, snow accumulation and road surface wetness in specific patches or along road sections. In practical applications, the methods could be used for better planning of snow clearing operations, forecasting of ice formation and spreading of road salt. Implementing the proposed methods could lead to lower maintenance costs, increased traffic safety and reduced environmental impact.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. x, 45 p.
Trita-LWR. PHD, ISSN 1650-8602 ; 1069
winter road maintenance; sensors; infrared thermometry, energy efficiency, road salt
National Category
Other Civil Engineering
urn:nbn:se:kth:diva-105152 (URN)978-91-7501-566-8 (ISBN)
Public defence
2012-12-07, V1, Teknikringen 76, KTH, Stockholm, 10:00 (English)

QC 20121116

Available from: 2012-11-16 Created: 2012-11-16 Last updated: 2013-09-02Bibliographically approved

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