On St. Kilda Road, in Melbourne, there's a sign that says "Vehicles over 2 tonnes gross weight DO NOT ENTER SIDE TRACKS". See here:
https://goo.gl/maps/JKoHNEB4ZxTcEnmp8
I don't understand this at all. Firstly, what are "side tracks", and secondly, vehicles over 2 tonnes gross (or 2000kg) basically describes about 1/2 of the vehicles on the roads these days. Maybe when that sign was first erected (it looks like it's from the 60s/70s era), there were almost no vehicles of that weight, but these days, pretty much all dual-cab utes and large 4WDs weigh that much. "Gross" weight refers to the weight including passengers on board, remember, so even a Commodore with 4-5 people on board will be over 2000kg.
Can someone explain this?