It's me again, the neighboring Kitty! XD
So i was testing further "The Dozer"™ , and i was happy to see that it could bulldoze directly "living tree"! So i was thinking "Ho it is great! To create roads easily, i will only need a shovel to remove ore patches in the way, and everything else (that is not bulldozed, like plants & ice etc...) could be picked by hand! Nice!" and then... Dozer-San (Japanese suffix :-P) hit a "dead tree" :-OOO => Impossible to bulldoze! NOOooooo! *my world crumbles*.
So here, i don't think that is a feature... ?! (but an oversight?) It makes very sense that it can bulldoze trees in the way (and that is very useful!), but "dead trees" (aka "a less robust tree than a living tree, or a ROCK per definition") should be added to the mechanics of that too obviously! B->
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For the record, i also notice for sprites that are not "blocking the way" (like plants & mushroom here; the rest is fine) for a vehicle... are not well hidden (like for an "ore patch" or "lost wood" where there is no problem) when "driving over". Especially the blue mushroom & the sour tuber (with the buggy) that are respectively totally & 90% appearing on top (and at high speed, it is worse!) when we drive over it. For the green plant, the 'nose of the vehicle' hides it normally & then it "springs" back over again around the middle... :-P weird!
I hope that is useful! =^^=