Originally Posted by
baralheia
Though it would definitely improve efficiency, BNSF wouldn't necessarily need to go to double track (DT) or two main track (2MT) operation in order to enable commuter rail - and no grade crossings would have to be eliminated. Several of the lines that Metra runs over have significant sections that are single-track with more than half of their road crossings at grade. You would definitely need at least a siding in single-track areas for stations, however.
I have heard vague rumors that BNSF is thinking of going 2MT on the Red Rock Sub (the North-South BNSF mainline that we're discussing here) because of the level of freight traffic over the line, so if they decide to do that, it could help the RTA as well.
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