I love route sheets*. They are works of art and genuine memorabilia. That said, I don't use them. I did once, even to the point of rubber banding one to my forearm (that was not a repeated experiment) but these days I follow my aged but trusty Garmin Edge 305. Reason being that I audax to ride, not to pass some test in decrypting navigation. Sorry, that wasn't meant to sound as harsh as it came out. No, point is, I found I was stopping too often for my liking to read the next instruction. I preferred to glance at the breadcrumb trail before an intersection and trundle on without the need to stop (give way signs etc excepted)
*French route sheets are different and basic in comparison, nowhere near the level of detail. Don't expect them to navigate you through a town for instance. They'll take you to the town limit and then you're on your own until you pick up the intended road out - ime anyway, and maybe different organisers do things differently. So it pays to know the next town on and follow road signs.