You guys are over thinking this.
Commuting has nothing to do with rest time. You are still "off" until you sign in.
To put it another way: these rest rules apply when you are signed in for a sequence and receiving per diem.
When signing in on day one you still have to look back 10 hours and find no duty time. Those are your days off. What you do on your days off is your business and does not interfere with 117 rest rules.
Regardless if you spent your days off golfing, commuting, sleeping, or watching porn you were still at "rest". Once you sign in its a different story.