Broad gauge line from Craigieburn to Seymour is Double-line-block signalling. Sections or 'blocks' are switched in to enable one train per line per block. i.e. Craigieburn- Wallan, Wallan - Kilmore East, Kilmore East - Broadford, Broadford - Seymour.The Double Line Blocks Craigieburn - Seymour are a veritable working museum.
It's a good thing that the line works fairly well as with only one refuge on the Dn at Broadford, and a trailing crossover at each block post, there are precious few opportunities to get rid of a failed train.
Are there any other examples of a block telegraph system left in Australia?
No; this is the last.