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- Silver: (VIC) colloquial term for a Hitachi suburban electric trains.
- Six-volt guard: see BOG
- Snapper: (QLD) roaming staff who check tickets, e.g. on trains or at stations.
- Spark: suburban electric train.
- Steel set: QR suburban passenger sets from 1960s, replacing the Evans sets.
- Standard gauge: (QLD) cape gauge, as opposed to the 'broad' standard gauge used in other states.
- Stick: colloquial term for signal.
Read more about this topic: Glossary Of Australian Railway Terms