The Lookway

Why, when driving on the highway and someone passes you or you pass them, they have to give you a look. Is everyone on the highway subconsciously hoping they pass someone they know? It’s not a mean look or a friendly look. Is it a look of judgment? Am I driving too fast, too slow?  Don’t judge me, yes I’m singing at the tops of my lungs while picking my nose! Keep your eyes on the road lady!