CHICAGO — Downed power lines have halted service for South Shore and Metra Electric District routes through Friday, part of the continuing fallout from the record cold weather in the Upper Midwest. South Shore service was halted after an inboun...
http://trn.trains.com/news/news-wire/2019/01/31-electrified-commuter-routes-stopped-by-record-chicago-area-cold
Brian Schmidt, Editor, Classic Trains magazine
Another reasonably compelling argument for constant-tension catenary!
It isn't clear from the article whether the catenary actually snapped in tension or was 'helped along' by vibration from or contact with the pantograph shoe. I'll be interested to see if there are similar reports from cold-weather experience in the NEC (and whether some effects apply to the constant-tension parts of the installations there)
Constant tension catenary won't stay in place too well when the supports are knocked over. A derailment on the parallel CN main knocked down some catenary supports.
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