new cycling paths

[Postboxer]

Trains do still empty onto the tracks though, they discussed it on the radio a couple of weeks ago, so not sure you'd want to be too close to the tracks. I agree though, alongside railway tracks and canals can be great places for cycle paths, for the reasons mentioned above, level, into town centres, few or no junctions with other vehicles.

[squeaker]

A27 between Lancing and Shoreham Airport, I've noted this is work in progress for a while.

Yes, it is a long drawn out effort The surface looks to be the usual shovelled (not flat) finish, and I don't see anything different about the fast lay by entry although the've had a bit of a go at the exit. Personally I'd just cycle along the lay by.... Then there's the usual hazard to keep you on your toes - hopefully moved by now!
Finally, as you say, it's suggested that one rejoins the carrageway (the quieter one being helpfully marked), but that soon spits you out to deal with a busy roundabout....