Canberra

The signs pointing to Batman Street have been moved higher up the poles to help deter theft

I did find that one amusing, particularly as moving it higher up might result in people having to bring along gadgetry (or a batladder) to make for a higher tech heist.

It’s interesting that Firth claims double meanings “didn’t really come into it”.

That does seem a little unlikely, I suspect someone in the planning department back in the day had a sensible chuckle at Iron Knob St before approving that one - safe in the knowledge that it could be justified as a legitimate entry into the naming scheme. I would imagine that selecting out double entendres definitely would come into it in current day street naming.

Honorable mention on the modifying street name front should go to Bellenden Street, which I have rarely seen sporting its actual name because the sign is so easily turned into Bellend street...

This part is a cool idea

It is a good idea, even with modern day electronic maps particularly long names can be hard to display let alone with hard copy maps.