Oh nice, that's the real move. I started doing that and ended up finding the best little spots just by wandering for a snack, not even at breakfast time lol. It's how I found my favorite late-night bakery.

Regular highway drives keep the DPF clean, @kellyr10 is right about stricter rules.

Remember that time you tapped on something and just knew it was bad? Like @noah415 said, that hollow sound is a dead giveaway. I once had an old wooden deck post that felt soft, so I gave it a tap and it sounded awful. Drilled into it and sure enough, it was eaten up from the inside by termites. Had to replace the whole section before someone put weight on it and it collapsed. It's crazy how similar the warning signs are to trees, makes you wonder what else we're walking past that's ready to fail, lol.