Nov 24, 2015 at 01:15 PM CST
by The Oklahoman Editorial Board
WHEN business conditions close a corridor, entrepreneurs knock on the doors of opportunity. Warren Buffett is doing just that with an aggressive expansion of his BNSF Railway Co.
Imagine a freeway with only one lane — not one lane in either direction but one lane in both. This describes much of the nation's railroad infrastructure. Two trains that pass in the night (or at any time of day) must yield to one another on sidings.