I thought everyone knew you have to have a red flag of some sort attached to the end of any object extending out beyond the length of your vehicle.
I have a GMC full 8 foot box pickup,that I haul 10 &12 foot horse corral fencing,I always duck tape a red flag on the end bar.
I've never had any problem with that setup.
However I did notice in the report that there was a yellow flag,which I have never knew another color then red could work?
After all red is way more noticeable then yellow,so I think this trucker may be at fault,just with his color choices.