Moderator: Site Management Team
I don't believe they use the starting amber (at level crossings at least), the red lamp just extinguishes. They're also quite good at co-locating level crossing signals with regular traffic signals when required and one nuance I've noticed is that the traffic signals generally change to red before the crossing signals activate, perhaps as is expected, but then when the crossing signals activate, they omit the closing amber on any heads with an associated RAG signal head, presumably to prevent there being two differing signals being shown to the same traffic.
I'd also forgotten that Australia uses (used?) wig wags in the general UK style, with a leaving amber, for emergency vehicle stations, however their level crossings generally follow the US style.