Thanks for the reply. It doesn't have to be people, just something to visually understand the size of these things. So yeah, seeing semi-contemporary objects and vehicles is awesome and just what I wanted to hear
I don't envy you having to get that sense of size and weight in the movement of the cars! the standard way would be to slow movement down to convey weight - something I'm sure you're trying to avoid. I guess impacts and explosions can help with this a lot though.