Slitherine

It's that time year again (mostly) where we here in the US commemorate the great, war-winning D-Day landings (overlooking the great Soviet offensive against Army Group Center, which could be argued was equally decisive).
In any case, the newsreels emphasize how the Allies cut the entire rail system in northern France, forcing the Germans to dicey road movement only. Which led me to wonder...could this be recreated in CEAW?
I mean, I've never really studied the Rail depot rules, since it didn't seem to matter all that much to the war in the East. Is it possible to use TAC/SAC attacks to degrade rail movement in a given region, or should we stick to TAC attacks on enemy units and SAC attacks on enemy cities?

The rail lines aren't placed on the CEAW map. Instead it simulates rail movement between cities with a simple method of tracing the shortest route. This is probably one of the biggest deficiencies of CEAW. Adding rail lines to CEAW is a major task indeed.

This means it's hard to interdict rail lines to cut rail connection to cities close to the Overlord invasion area because in fact every hex (except some terrain types) can be used to rail movement.

In GS you can reduce the enemy rail capacity by bombing the rail cap cities like Berlin, Leipzig, Dortmund, Munich, Hamburg. If you also bomb a city down to red then you ruin its port repair and rail cap ability.

So you can in some way reduce the German rail cap in 1944, but not via interdiction air strikes.