Quantifying Salt Concentration on Pavement: Phase I, May 2015

(2015) Quantifying Salt Concentration on Pavement: Phase I, May 2015. Transportation, Department of

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Abstract

Winter maintenance operations typically involve the application of salts to roadways to combat the formation of ice or snow pack on the road surface. Precise knowledge of pavement conditions, especially the amount of salt remaining on the pavement surface, is needed to maximize the benefits and reduce the negative effects of road salt usage. Salinity sensing technologies are effective solutions to meet such needs. The focus of this phase of the research was to report on available mobile salinity measurement technologies. Technologies were identified through a literature search, a review of patents, information provided by vendors and manufacturers, survey responses, and follow-up interviews. A survey was conducted to gather information from winter maintenance professionals at state, provincial, and local transportation agencies on their experience with salinity sensors in snow and ice control operations. Responses were received from 6 countries and 17 US states. Respondents expressed significant interest in the use of mobile salinity sensors, with 90% indicating that they either would consider using this technology or were unsure and only 10% indicating that they would not consider using this technology. Respondents indicated that cost, accuracy, and dependability were of greatest concern and were potential barriers to implementation. Three types of salinity sensors were identified: in-pavement sensors, portable sensors, and vehicle-mounted sensors. Seven mobile salinity sensors were identified as potential candidates for Phase II field trials.