I use TomTom on my cell phone.... costs me $25 in the apple store and does not rely on cell towers for its signal. There's also Waze, iMaps, Mapquest and Google maps.
I also bring along a copy of Yahoo Maps images and driving directions "just in case" but my 3 sons have never used a "map", just their phones. One delivers Pizzas while going to college, the other is a pilot and uses it wherever he is, the middle guy just uses it like me.
Everybody seems to have their "fav". For me it's TomTom, Son No. 1 likes Google Maps, Son No. 3 uses the iMaps, I dunno what Son No.2 using at this point. I have been using GPS Navigation for about 20 years ... started with my laptop, now on the smartphone. I dislike the ones that use cell towers as compared to the ones that use GPS as the former oft has to download maps as you travel and if you outta range of a tower, it can't do that.
Getting back tot he web based directions like Yahoo / Google.... here's some things to try that might help.
On a long trip, break it into segments. Say on a trip from NY => Wash DC to directions for:
-a. From NYC => North Jersey
-b. Jersey to Delaware
and so on...... can also zoom in and give images of major interchanges.