During cross-country road-trips in the United States, statistically speaking:

• Are you more likely to expire whilst sleeping in a car at a rest-stop, or a chain installation/removal area, or other some such around the highway (violent car-jacking?), or,

• Are you more likely to get into an accident due to drowsy driving?

Let's assume that in the former case, you drive drowsy for a total time of 1-hour per day and sleep for 6 hours per day (e.g. not needing any hotels after all); and in the latter case, you speed and drive drowsy for 6 hours per day (to get in time to the hotel, well past the midnight, to get proper sleep) and sleep on the highway for 1 hour, and all drowsy driving happens at nighttime. Assume somewhat of an average car, 2–6 year-old, with an MSRP of 16–24k USD when it was new.

In your answer, please re-state any assumptions from the question, and state any other assumptions made (such that it'll be possible to amend the question without invalidating the answers).