Driving Frazz

This Frazz strip by Jef Mallet was from 2008. It's a tad perplexing I think... Frazz is a cycling freak so maybe the joke is that he sort of zoned out while driving and "woke up" to the fact that he'd started driving one of his cycling routes instead of going to his intended destination.  I thought Frazz had adopted a GPS before this one ran.  I dunno.