If what someone posted above was true, that it was a 2 lane road on some kind of berm through marshlands that would never hold up a tank, you would think this information might have changed these plans drastically.
If Monty did not know, then someone else should have been facing court-martial for the coming fiasco.
Or maybe he was told but was “married to it” by then, had become his baby so to say.
Bottom line, as colorado tanker stated, Monty let his personal vanity control his military judgement. And Tommy and GI Joe paid for it.