Quote:
Originally Posted by PhillyPDX
It’s a federal rule, 79 has been the max since 1947. Exception is Amtrak in NE corridor, because that is on separate tracks.
If you want to go faster, you need a dedicated ROW. No sharing/at grade crossing of freight lines.
Faster lines in PacNW needs its own tracks, and that’s what HSR advocates are pushing for. But it’s obviously substantially more $$$.
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The 79 rule is actually related to signaling systems and track quality, in cab signalling and better track quality = higher speeds, see the recently upgraded 110 mph track from Chicago to St Louis or the Brightline shared use segments.
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