When I wore bibs, I worked out my own system for nature calls. I'm not a pee on the side of the road gal, I usually end up hitting my foot, so this is for porta potties and real honest to goodness flush toilet facilities.

Unzip the jersey, pull my arms out, wear jersey like a necklace. Slide bib straps off shoulder and pull 'em down. Take care of business, pull 'em up, slide straps back, re-orient jersey.

I wish they had bib running tights..