All-season road to N.W.T. mines could extend ice road use by
https://www.cbc.ca/news/canada/north/all-season-road-to-n-w-t-mines-could-extend-ice-road-use-by-a-month-1.2937351
"turning the first 150 kilometres of the ice road into an all-weather road could... increase its operating season..by a month."...[because the southern part melts first].
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https://i.cbc.ca/1.2937662.1422628096!/fileImage/httpImage/image.JPG_gen/derivatives/original_300/tibbitt-to-contwoyto-winter-road.JPG