Where this might work in some form is BNSF's Cascade and Steven's Tunnels. If freights are run with diesel/battery-slug combinations, more freights could run through them. With battery power, one less locomotive to fowl the air in the tunnel. So less time needed to purge the tunnel between trains. I think it takes 30 minutes to purge Cascade after a train. Was Cascade at one time an electric division on GN?
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