PSI for road bike tires?

[Seajay]

Good One Eden. Sheldon strikes a nice balance. Regarding his comment
" the rolling resistance at correct inflation pressure is already so low that the infinitesimal reductions gained are more than outweighed by the trade-offs"

I take this to mean that if you are somewhere in the ballpark of the correct pressure...the changes in rolling resistance are so small...that "we" are making up any differences in our heads. THAT...sounds like the late Sheldon Brown

The rest of the article is a nice summary as well.