Millimeter wave radar is usually described as being able to detect pedestrians, although I see VW hedges - that may reflect more legal realities than engineering goals. I wouldn't try it with a person, car or tree - if the test doesn't go well, it will be catastrophic. Something like an empty outdoor plastic garbage can is pretty big so you'd hope it would be detected, but it's not valuable itself and shouldn't damage the car too much if you hit it. Assuming you have a safe empty road, maybe you could do it at 30mph and plan on swerving into the other lane to slip past the can if the car looks like it won't stop? Better to miss the obstacle altogether if the test is a fail, even if it's a plastic garbage can.
Last edited by 1594; 02-17-2019 at 11:55 AM.