Will the tram trolley poles or pantographs still work if that wire at the level crossing were raised?
No, the wire was already at near the maximum height the trolley poles are designed for.
If not, a "drawbridge" contraption should be fitted to raise the wire out of harm's way when not in use.
The wire was already some what higher than the highest legal vehicle height. And the height it was at is also the minimum height Ausgrid can use for 415v power lines, the height you find Optus and Telstra TV cables, etc, etc.
The wire over the prices highway is was not lower than you would find elsewhere.
Side note - height restriction signs are not needed for the crossing as the wire is above max legal vehicle height. I haven't checked the fine print the the road signage standard, but it may not even be permitted to put up signs warning of a 'low' object that's higher than the standard max vehicle height.
I'm not sure why the museum should have contraptions to raise it's wire even further above legal max height just to cope with the few idiots who think it's find to drive about with an over-height load. It's also been the first damage on that crossing in over 20 years.
It doesn't help things that the minister then goes and says 'we should make all new tunnels higher'. All that would do is allow the industry to lobby for even bigger trucks, and the same thing will happen all over again with cowboys who flaunt the rules, but just higher than now. Talk about treating the symptom and not the cause.