1
00:00:02,414 --> 00:00:07,888
Eleven o'clock at night. You fill up at the service station and set off anyway.

2
00:00:08,629 --> 00:00:13,415
Driving at night seems practical: empty roads with hardly anyone around.

3
00:00:15,512 --> 00:00:21,256
With less than four hours of sleep, drivers are found at fault fifteen times more often.

4
00:00:24,315 --> 00:00:32,747
With five hours of sleep, the rate doubles. With six, it's a third higher. The baseline is seven to nine hours.

5
00:00:33,618 --> 00:00:39,179
Empty roads don't make up for lost sleep. They just leave you alone with it.

6
00:00:40,013 --> 00:00:46,370
Sleeping first costs you one night. Going without can cost everything else.