Originally Posted by HoustonB

Excellent video.

I'm thinking of doing something similar but with a 3 foot, very thin, flexible rod that sticks out into traffic from the rear rack - the traffic (backward) facing side a mix of neutral colors, the camera facing side high visibility with heavy black lines at the 0, 1, 2 and 3 foot marks (3 feet starts at my elbow, not the bike).

Choosing an appropriate material for the rod is the challenge - it needs to yield without breaking into dangerous projectiles when hit by vehicles that might be doing over 55 mph, but it also needs to be rigid enough not to bend (too much) when riding.

Ideally I would also like something that determines the speed of the passing vehicle, even if it is just me shouting the speed for an audio record.

In Oregon we can use a citizen initiated “violation proceeding” leading to citation.