Do whatever it takes to fix this problem. No matter what the police reports say, driver fatigue is probably the number one cause of solo vehicle traffic collisions (and I should know, I worked about a jillion solo rollovers on I-5). In my younger days I used to drive much longer than I should have; I rolled the window down, sang to the radio (thank goodness no one could hear me), and often stopped to walk around and spash water in my face to stay awake...