"The road outside my house is paved with good intentions" is a reference to the road to heaven "the road to heaven is paved with good intentions", I think that's a bible verse in proverbs or something. "hired a construction crew" means that he can't get to heaven on his own, because "its hell on the engine" which means if he were all on his own, he'd go to hell, as the engine is metaphoric for himself. That's the only part of this song that seems to make sense to me, but its still a really awesome song.