I got stopped at the bottom of the St Kevin's bridge. I asked them what they were doing. It's a survey for Monash Uni Engineering Department. They gave me a paper (which is still in the bottom of my bike somewhere)
which has a contact number in it. When I dig it out later, I'll put it up.
They just asked me where I started from and where I was going to. There's heaps of people along that route each morning.