Timetables for chaining.....

• Train formations should be consistent between simulations, especially where divides and joins are concerned.It's best to work these out 'on paper' before writing anything in SimSig


• Each train should have its own unique identity to avoid complications with trains crossing boundaries. If 1G00 enters Bristol from Westbury in a chain, and there two 1G00s in the Bristol timetable, there's no guarantee that the correct one will be selected. The chaining code can usually match it to the correct one, but there's no guarantee and aas Bristol is an old simulation the code might be less clever. Ideally you'd use UIDs, but as Bristol isn't on the Loader, you'll need to use 1G00-1, 1G00-2 etc., and ensure they're consistent across all the timetables

[li]Trains entering at a chain location just after midnight need special consideration. For instance, a train entering Bristol at Hullavington at 00:01 won't appear when chained- you have to make sure the train is seeded in SwinDid. This requires more thought for trains leaving Bristol, as you can't seed them directly at signals. You'll have to use a bit of license to have them running late from the closest signal to the boundary in Bristol, or early from a seed/siding in Swindon.

Just write the timetable as normal for both sims. Just make sure that the timing points at the last couple locations, say going from Bristol into Swindon (A), that you have Bathampton Jn and Thingley Jn as the same times on each.

Will work either way. And say you don't have a train that is timetabled into the next sim, you will just get a message saying something like non timetabled train (or something like that, unsure of the actual message) as the train enters the second sim, and vice versa.

For some stupid reason Swindid got the entry point as Chipping Sodbury, which is non-mandatory except for trains that loop there. Hopefully at some point the sim will be extended back to Westerleigh so that you don't need to calculate/guess the correct entry time.

Chipping Sodbury is the location of a heavily-used goods loop

" said:

For some stupid reason Swindid got the entry point as Chipping Sodbury, which is non-mandatory except for trains that loop there. Hopefully at some point the sim will be extended back to Westerleigh so that you don't need to calculate/guess the correct entry time.

While I do not support the decision to have Chipping Sodbury as the entry point, I'd postulate that he "stupid reason" is that Chipping Sodbury is the location of a heavily-used goods loop, and is also the limit of reversible working on the Badminton lines. It presumably made sense to treat this as a mandatory timing point at a time when the auto CIF-generated timetables we (specifically) have become accustomed to writing weren't really available. When you're manually writing out each train calculating an entry offset isn't exactly arduous additional work.

Dave to answer your query more directly, For HSTs I'd take the Westerleigh time and add 1H minutes.

It's about three miles from Westerleigh to Chipping Sodbury, so at 75 mph that's about 2 and a half minutes, and 2 minutes at 90mph.