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Road surface wetness variations: Measurements and effects for winter road maintenance
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Environmental Physics.
2013 (English)In: Journal of transportation engineering, ISSN 0733-947X, E-ISSN 1943-5436, Vol. 139, no 8, 787-796 p.Article in journal (Refereed) Published
Abstract [en]

Road wetness is a critical parameter when it comes to preventing road slipperiness. It has so far been difficult to measure, but new measurement techniques on the market make it useful to investigate the savings opportunities within road maintenance operations. The present study tests a new sensor mounted on a road maintenance vehicle run in a maintenance district in central Sweden. The sensor that measures road surface water depth is connected to a global positioning system (GPS) system and a global system for mobile communications (GSM) phone modem. Potential savings are calculated based on the measured road surface water depth and on the amount of applied salt needed to lower the freezing point to a certain degree. The results indicate variations in water depth along the measured roads, which implies that the salt concentrations along the roads could also vary. Though the variations were smaller along the tested highway, the calculated savings could still be up to 22%. Despite the many assumptions made in the calculations, considerable savings could potentially be realized by applying such wetness measurements.

Place, publisher, year, edition, pages
2013. Vol. 139, no 8, 787-796 p.
Keyword [en]
Road wetness, Mobile measurement, Road salt savings
National Category
Other Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-105147DOI: 10.1061/(ASCE)TE.1943-5436.0000546ISI: 000322720800002Scopus ID: 2-s2.0-84881225767OAI: oai:DiVA.org:kth-105147DiVA: diva2:570105
Note

QC 20130902. Updated from manuscript to article in journal. Previous title:

Road Surface Wetness Variations – Measurements And Impacts For Winter Road Maintenance

Available from: 2012-11-16 Created: 2012-11-16 Last updated: 2017-12-07Bibliographically 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.
Series
Trita-LWR. PHD, ISSN 1650-8602 ; 1069
Keyword
winter road maintenance; sensors; infrared thermometry, energy efficiency, road salt
National Category
Other Civil Engineering
Identifiers
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)
Opponent
Supervisors
Note

QC 20121116

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

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