However this route is much longer and is heavily graded over long distances. Thus, putting aside any loading gauge considerations the route via the Severn Tunnel would be operationally. The Barnt Green route is much more difficult from the operational viewpoint. In the north of the Bristol area it crosses the busy passenger route from London to South Wales as well as being the passenger train route from the South West to the Midlands. There are no loops which could be made long enough to hold the train for a distance of nearly 30 miles north of Bristol.
Looping would be essential as Railtrack have had considerable difficulty in honouring the one freight path per hour that is supposed to be available on the route. Rejecting the possibility of Dibden Bay container trains using the whole of the route does not rule out other freight traffic (see Section 10) using the route throughout nor does it necessarily prevent this traffic using part of the route.
Trains from the Southampton area, including Dibden Bay could use the route as far as either Salisbury (and then towards Basingstoke) or Westbury (and then towards either Reading or. Both of these options would impose broadly similar requirements in respect of infrastructure south of Romsey. The Westbury alternative would have its own needs further north and is therefore considered first. Timetable study shows that it is just possible to time a heavy container train between the standard hour timetable passenger service throughout from Romsey to Westbury.
However this will not work in every hour due to the detail variations in the passenger service and it would not therefore deliver the ability to run 20 container trains per day. As discussed below, Best Logo Design a loop facility will also be necessary for trains which go towards Basingstoke but it cannot readily be shared with the Westbury option except in one, not entirely suitable, case.
The site near Kimbridge would, in timetabling terms, be of little use for a train proceeding towards Westbury as a stop here will result in a timing forward which is only a minute or so different from a passing time at Romsey. But if there were to be an overtaking facility at West Dean it would provide a much better timetabling situation for both routes. The Salisbury area offers no opportunity to provide a loop for Dibden Bay trains and offers little improvement on present capacity even in return for very large expenditure.