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| SYT trains headcodes meanings? 15/10/2023 at 13:30 #153663 | |
SS9g0045
6 posts |
Just wondering about the meaning of SYT train headcode. For example 1--A or 23-B. I read about the numbers represents a combination of sector and type of trainset, but didn't find anything about the letters. Noticed A, B, C, and E so far. The intercity, regional, and freight trains seem to follow TOC standards pretty well so far. Thanks! Log in to reply |
| SYT trains headcodes meanings? 15/10/2023 at 21:52 #153673 | |
drew
71 posts 
|
The Sydney suburban services are usually bracketed by set and sector, which is explained in the front of the SWTT. The numbering has changed over time. The 4th alpha character is the trip leg. A given train, say 100- run, will keep its number all day, but the trip leg will increment when it changes ends, or passes through one of a number of locations like Central. We had a thread about this on the forum recently. So say 100A started out of Flemington MC first thing in the morning and ran to Central. It the goes around the city circle and becomes 100B, runs via Bankstown to Sefton Park Junction, becomes 100C. It hasn’t reversed direction yet, but it might now terminate at Lidcombe and become 100D back towards the city via Bankstown. It will usually stay as 100 run all day, just keep stepping the trip letter. They don’t use I,O, or Q. The rub comes if they run out of letters before the end of the run. This was a problem on sector 2, as per my 100 run example, so they swapped the low numbered runs from sector 1 to sector 2. 1–A (or 99-A) can keep stepping to 1–Z, then utilize 1-AA (or something) and keep stepping. Log in to reply The following user said thank you: SS9g0045 |
| SYT trains headcodes meanings? 18/10/2023 at 03:06 #153703 | |
flabberdacks
649 posts |
edit: misread part of your original post, with apologies Every time there's a direction change from up to down or vice versa, the number increments. So you see -A and -B early in the day, and numbers further along the alphabet as the day goes. For suburban passenger trains, the letter is just which 'leg' of the train's daily diagram is currently in progress. The letter doesn't have anything to do with sectoring or anything. Last edited: 18/10/2023 at 03:29 by flabberdacks Reason: None given Log in to reply |