Also, I need to add two exceptions to my no-expressways rule: The two times it makes sense to be on an expressway are:
(1) You need to get somewhere in a hurry, or
(2) You're passing through or close to a big city, where the local roads are dull and choked with traffic.
Of course, you should stay away from those areas as much as possible while touring anyway, unless you have some reason to be there! ;-)
96 Honda XR250 Baja ・ 09 BMW R1200GS Adventure ・ 09 KTM 990 SMT (sold) ・ 97 Honda X4 ・ 95 Kawasaki ZZR400 (sold)