In Australia sometimes on the side of a straight stretch of road you'll see a car park parallel to the road. More often than not, these have radar that is used to catch people speeding.
The other day, my uncle said that there's no law stopping someone from parking in front of one of these unmarked radars because they are apparently done by contractors, not the police, and the contractor can just re-position. (He even joked that you could box them in with two cars.)
But I am wondering, is there any law in Australia about obstructing the view of an unmarked vehicle with radar? Would it be different if it was a police car?