And here is a secondary complication to my question:

I am a recumbent rider; it is a trike so my 'wingspan' is 30 inches rather than a single tire span. And my profile is lower. Yup, I do use a flag to enhance the visibility; agreed about lighting up with flashing rear lights and headlamps.

But whereas most of you DF'ers, I ride at about 13 - 15 mph rather than the 15 - 20 mph that you can maintain.

So any modifications to the comments?

Thanks for the first round of responses.