Just thought I'd share this because I found it quite interesting.
Yesterday my northbound CCN stopped at Hawkesbury River for around 10m. I asked the guard what was going on, and he said that there's a freight train coming south, but with a steel plate sticking out of it. So our Mariyung couldn't proceed until they've sorted out the issue.
He said that the signaller told the driver to stop, and the driver relayed this to him. And that we couldn't move until the signaller says it's OK.
The freight train shows up going pretty slow. I forgot what locos it had. It stops with the first loco maybe 20 metres off the south end of the platform. I asked the guard why it stopped and he said that someone's gone to fix the issue.
A few moments later the guard goes into the cab and talks on the radio for a bit, then tells me that we can go now. As we leave I saw a worker walking beside the freight carriages carrying a bent steel plate, maybe 1.5m long and 50cm across.
As we passed the bridge I did notice that the tracks were pretty close together.
that's a great idea, thanks