The "West Wilts" corridor is perhaps unique in the South West in that it links up six large urban areas which are designated (or likely to be) designated as Strategically Significant Cities and Towns under the Regional Spatial Strategy - thet means heavy growth, with 35,000 homes expected between these towns, equating to a population increase of around 72,000 persons. A revision is probable on the number of homes, in an upwards direction - so don't be surprised if the population of the corridor grows between 100,000 and 120,000 by 2025 in the SSCTs and other towns such as Melksham and Westbury too.
SSCTs in West Wiltshire
Swindon
Chippenham
Trowbridge
Frome
Warminster (Probable)
Salisbury
I understand from contacts closely associated with the South West Regional Assembly that the choice of this corridor for dramatic growth was to a great extent encourage by the availability of a railway route, layed to high standards, alnong the corridor length. Just one problem ...


... only 2 passenger trains each way daily (2 Northbound ONLY on Sunday) which forces almost everyone who travels along the corridor onto the road. The two pictures above were taken between Chippenham and Melksham, late in the monring of Saturday, 1st September .... plenty of cars (to offer plenty of short and long journey customers to the railway) .... but no trains. The First southbound train of the day doesn't run until 15:45 on Saturday.
The Department for Transport's information site tells me that the journey time [Chippenham to Warminster taken as an example] is 41 minutes by road, but (at the right time of day), rail travellers will only be on the go for 25 minutes. Carbon emissions are 5.3 kg for a car journey, 1.8 kg for the train user, (Bus was 2.8 kg, but the site didn't offer us any bus timings for Saturday evening!) and costs were 6 pounds for car fuel, return, or 7.40 return by train.
Would people use the train if it was more frequent? Yes - they would. 120,000 journeys were made last year on a rapidly growing service of just five trains a day, with users and other people I spoke to alike saying they would use it much more if it were to be more reliable and a little more frequent - say every 2 hours. And usage would rocket if it were reliable and hourly!
I have been looking - somewhat in vain - for another comparative route. Nothing comes up to the population size without it being an urban line. So Let's Try
Carlisle (pop 100k) v Swindon (pop 180k)
Maryport (pop 26k) v Chippenham (pop 30k)
Workington (pop 26k) v Trowbridge (pop 30k)
Whitehaven (pop 26k) v Frome (pop 25k)
That's not really a good comparison ... there's Dalton, Wigton, Aspatria, Flimby, Hartington and Parton along the Carlisle line - all much smaller places which are often request stops on the train, whereas there's Melksham (24,000), Westbury (11,000), Warminster (20,000) and Salisbury (115,000) on the "TransWilts".
Train services on the Carlisle line? 14 per day. On the TransWilts? 2 per day.
I expect that the service levels in Cumbria are about right; after all, it's well represented by MPs who have an inside line to the government as they represent the same party. Perhaps my comparison isn't so foolish after all - perhaps it shows that we, too, should be linked by a service of this level. But wait - perhaps there's honest scope for a higher bid. I haven't even allowed for those extra 100,000 who will be living around here.