I have to admit I was basing my comment on old photographs, not personal knowledge, but the headroom doesn't look generous in the photos linked below (scroll 2/3 down for viaduct photos).
http://www.rmweb.co.uk/community/index.php?/topic/65976-newport-isle-of-wight-1970-1976/
But either way, I don't think there's any doubt that subsequent changes in the area have meant that reinstatement of the old alignment is completely impractical.
Hi DelW,
I was in mid flow and pressed the wrong button! Ah well part 2.
The whole Island scene has changed dramatically, I mean really dramatically since the 1960's.
Then there were two main corridors Ryde-Newport-Cowes (To Islanders Cowes is always West Cowes, East Cowes always being known as such.) and Ryde-Sandown/Shanklin-Ventnor.
The three biggest towns being Newport, Ryde and Cowes. Cowes was really an industrial town that with the demise of much of its engineering base has become even more yachtified. The dominance of yachting is really incredible, but tends to employ people in small firms not large ones like JS Whites, BHC, Plessey etc.
Ryde was the gateway to the Island with massive seasonal fluctuations as it 'processed' via the pier thousands of holidaymakers going to Sandown, Shanklin and to a lesser extent Ventnor.
Newport was always a bit of an enigma, geographically central, home to the Council (and thus jobs) and the largest town with a large number of people employed at the three prisons.
Shopping wise the Island was a joke, never having any major stores till Tesco decided to open a major store at Ryde Airport in the early 80's. Since then we have seen Marks & Sparks arrive, Sainsbury's, Morrisons etc and these are all in Newport thus pulling more people into the centre and thus adding to the traffic problem.
Now, had the railways limbered on there could have been a case for a mix of some kind of tram/heritage service provided, though I suspect too much time would have elapsed before attitudes to climate change came more to the fore, resulting in the closures anyway. Nevertheless this really is the way it should go, because the issues on the Island are quite bad and will only deteriorate.
Outside of Newport and Cowes, much of the old alignments are traceable but trying to recreate Ryde-Newport-Cowes is impossible unless some kind of tram system was constructed using part of the old alignments. There again one can no longer effectively get to the old station site in Cowes. Houses have been built on the approach to Mill Hill and between the tunnel and the old terminus now a supermarket. If a tram system was ever to come to fruition, it would make sense for the IoW steam railway to work the Ryde-Sandown-Ventnor (ever hopeful) axis with its traditional tourist appeal.
So sadly, the here and now policy has stored up problems for the future.
I recall IoWCC did get some studies done, probably around 2002ish and IIRC the tram idea was binned as too expensive.
That is probably the correct assumption, certainly on financial grounds, but unless the bullet is bit so to speak one suspects these arguments/issues will forever dog the Island's transport network.
Finally, on a much more positive note, if any poster visits the Island please go to the End of the Line cafe at Freshwater. It is built on the former station throat of Freshwater station and has lots of interesting photos of the station area on the walls. Part of the old station platform is still visible in the Co-op car park (although the Co-op is relocating soon across the road). It is located at the bottom of Hooke Hill/Afton Road. The cafe is about 100yds/m along Afton Road.