Are you leaving the existing platform 4 in place? The idea of a future through platform at the East is having two through southbound platform faces on an island to allow more services. Having those platforms separated by a bridge would be a lot less convenient.One track would add capacity, but two would be better. All I'm saying is that with hindsight they should have left the current bridge where it is.
With an extra two tracks to the west, and a new island platform, you don't need a through platform to the east.
No, I mean the road immediately to the West of the station that provides access to the housing North of the canal.Raising the elevation by 2m requires 200m of incline at 1%. That's not so much
You mean the station staff car park? Probably. Again, there's a lot more space over the canal than there is under Botley Road. Whoever signed off the work without adequate ground investigation does not deserve to keep the title Civil Engineer.
Just look at a map, almost immediately North of the platforms is Castle Mill Stream, the bridge carrying the road is right beside the railway lines. You have single digit metres, not 200m so you’re going to need a new bridge over the stream. There’s housing either side, where’s it going?
I agree that they’ve made a pigs ear of the work, but there’s no way that your alternative is going to work. It doesn’t resolve any of the highway issues with the current bridge, and could well hit similar issues trying to dig foundations for a new bridge.