You should know better than（ ）into the road.

know better than+不定式.这种结构意为“不至于”：
She knows better than to go alone on such a night.
在这样的夜晚,她不至于连不宜单独外出也不知道.
know better than to do sth.的含义是be wiser,better informed,or more
sensible than to do or believe sth.