crs1026
Superstar
What would it take to upgrade it to 40mph?
New everything. I suspect it's just plain worn out. Specifically
- grub (remove vegetation)
- clean out culverts and restore drainage
- undercut to remove the existing ballast (which is likely mostly dirt at this point)
- new crossties
- new rail and fasteners
- new ballast, attention to subgrade, maybe geotextile in places
- resurface, restore superelevation on curves
- rebuild crossings (There are 46 of them between the platform in Stratford and Egerton Ave in London)
- new crossing protection devices
- repair bridges, replace deck
But that's by no means complicated, or even that expensive. No fancy engineering required. No large civil works, mostly just a decent sized mechanised track crew.
The cost of raising it to 75 mph or greater is probably not that much greater than the cost of 40 mph, so do it once and make it right.
- Paul
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