MapQuest and Google Maps have repeatedly failed me because their maps & directions completely neglected to take detours into account, and I end up lost as a result. With Google Maps I can print a map showing the course, but the only streets it labels are those on that course, which is utterly useless when you’re lost.
Does anyone have good experiences with an online map service that does take detours into account on a timely basis? I don’t expect it to keep up with road work, but accounting for detours is essential.