Hi,

railway=disused/abandoned... hmmm, oh yes, the supplemental disused:railway=rail says it pertains to the rail part. Was recently made aware that lifecycle tags for certain objects/parts are to be placed on a separate tag rather than a prefix... think it was on the community forum so I'll get to that when I'll get to that and checking back had completely forgotten about it, 3 years ago did it right https://www.openstreetmap.org/changeset/108043691

Anyway, In fact, razed is closer to the truth for the sections that have gone under the cycleway paving like most, for sure it will never ever be reinstated as a railway. 

Got the same between Ortona and Vasto (now that is a really really nice cycleroute on the sea border). Dutch will love it as it often gives a nice stiff breeze either going SE or NW blazing over the Adriatic.. put your factor 50 on. Temp differences between sea and land can really amplify that effect.

These rails mostly better to be placed on the OHM site is my opinion, somewhere external to standard OSM.

A mapper complaint recently running a double flat because he tried to cycle on a remaining 1.5km piece where the rock bed was still there but absolutely everything else removed....you need to swap to the SS16 primary and pray while traversing there, heavy lorries racing by, actually now routing there, but recommend to better push bike that stretch along the old track. Don't know the history why that part is not done up. 3m wide cycleway stops dead and then continues 1.5km further on, 3m wide.

Also Sangritana between Lanciano and Casoli and on is thoroughly abandoned, sections truly gone but still tagged as disused. A mapper went about few months ago restoring the level crossings again as were they operational. Some hardware (lights, liftgates, signals is still there in severe dilapidated state and some crossings have no binaries to see, just asphalt... ah yes reminds me of Ortona - Orsogna... in practical terms gone but a few relics and yet still tagged as disused, As said, the local rail aficionados can put their teeth in on those.

Maybe was:railway tag... there's 4K use on TagInfo (no wiki, lots of tag combos), At any rate, I let mostly the rail aficionados worry about that, the local community that is, long as it does not conflict with the rests of the way routing which it did when I made that change, think around the time when I mapped the 3100km Appennino Bike Tour route in 44+1 stages... The 1 having a part actually traveling by rail to the ferry port going to Messina- Sicily. https://www.openstreetmap.org/relation/17814924.
Was a few weeks of work including resolving routing issues. You need some really good legs for sections like Torre to Passo San Leonardo on to Rivisondoli

cheers