Item: SITE-SPECIFIC SLUSH FLOW WARNING ON HIGHWAY RV80, NORTHERN NORWAY
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Title: SITE-SPECIFIC SLUSH FLOW WARNING ON HIGHWAY RV80, NORTHERN NORWAY
Proceedings: International Snow Science Workshop 2024, Tromsø, Norway
Authors:
- Dag Theodor Røsvik Andreassen [ Norwegian Public Roads Administration ]
- Ms. Jeanette Kvalvågnes [ Norwegian Public Road Administration ]
- Ms. Ida Bohlin [ Norwegian Public Road Administration ]
- Ms. Elisabeth Rasmussen [ Norwegian Public Road Administration ]
Date: 2024-09-23
Abstract: RV80 is the main road to Bodø, the largest city in Nordland County in Northern Norway. About 30 minutes outside the city is Ytre Kistrand, an area with several slush flow paths known to close the road almost every year. In February 2021 a contractor on duty for the Norwegian Public Road Administration (NPRA) died from his injuries after a slush flow hit his car and threw it upside down on the railway 10 meters below the road. In November 2023 the NPRA started the construction of mitigating measures at Ytre Kistrand to protect road users. Catchment dams are constructed with drilling and blasting in the rock on the upper side of the road. The construction work progressed through the winter, which is when slush flows occur. To establish mitigating measures, workers are exposed to slush flow terrain daily. To reduce the risk of accidents it was decided to use a site-specific slush flow warning for the construction site during the winter. A site-specific slush flow bulletin was usually published every three to four days, but daily in periods with elevated hazard level. The hazard scale was divided into 4 levels with associated measures. The published hazard level was based upon the snow cover in the release zone and the weather forecast. During the winter there was one slush flow event within the construction area. The construction site was closed due to a high hazard level.
Object ID: ISSW2024_P6.2.pdf
Language of Article: English
Presenter(s):
Keywords: Slush flow, site-specific, warning, mitigating measures
Page Number(s): 750 - 753
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