I am being forced to car share with someone I suspect might be an Atheist. Advice please??? [Spirituality & Religion]

I recently started a new job which is 38 miles away and the only wayI can get there is by getting a lift with someone Im pretty sure is an Atheist!

I live in an area with a lot of costal roads and obviously my main concern is that he decides to kill himself as hes giving me a lift to work by simply driving over a cliff.

But also im worried for my co-workerers too. The Atheist is very pale and sometimes starts muttering to himself all through break and its very sinister. He's probably going to go nuts sometime soon, what can I do?