I've had motorists roll down their window and thank me for wearing visible jerseys when I been wearing solid yellow or very bright orange. Never for any pattern. And as a driver, I have found riders with very bright patterned jerseys sometimes disappear in the mottled light under trees. As much as I can, I buy only bright, solid jerseys simply to improve the chances of hanging around longer. (I joke I have yet to see a bright orange road kill squirrel.)