A lot of times when it comes to designs, it's best to keep them simple and if they're not bad, don't fix them to where they look worse than before. For example the Diverted Cyclists sign can distracted people by the "D" because it has a larger and bolder font than than the rest of the signs letters. Designs can actually go from nice and appealing to bland and boring like Citroën's slick upturned V's on the cars front grill were changed to "characterless digital smudges" instead.