Dunno about other states, but here in Sydney, the Fixed Radar traps use 2 spaced Contacts on the road, and not the Doppler effect on Radar.
So in theory, the only way you can trick these things, is by changing lanes between the road contacts (Dunno????)
Reminds me of when I was young, walking home drunk as a F@rt with 8 of my friends, and finding oursleves a Red Light Camera.
All of us tried jumping up and down on the road sensors on the intersection, whilst the Traffic light was Red.
It never took a photo, but I wonder what the Cops would have said about the scene, if it ever did !!