Considering most of my arguments are self-evident, no. I'm not going to provide research to prove that... let's see, "bumper stickers are attached to cars," or that "official road signs are easy to read at a glance."
Try providing some evidence of how "highly regulated" billboard distraction levels are and I might take this conversation seriously.
"Generally, billboard-related distraction appeared to be minor and regulated by drivers as the demands of the driving task changed. However, this review’s findings suggest that this may not be true in all cases. Future research should emphasize the tails of the distribution in addition to average cases, in terms of both the analysis of visual behavior and the complexity of driving tasks. Further research is also needed to understand the effects of billboard design, driver characteristics, and road and traffic context."
Try providing some evidence of how "highly regulated" billboard distraction levels are and I might take this conversation seriously.