See also:

Other Warning Devices
If you carry reflective triangles, you can set them up at the side of the road about 300 feet (100 m) behind your vehicle. ...

Following Distance
Stay at least twice as far behind the vehicle ahead as you would when driving your vehicle without a trailer. This can help you avoid situations that require heavy braking and sudden turns. ...

Automatic Dimming Rearview Mirror
To adjust the inside rearview mirror, hold the rearview mirror in the center and move it to view the area behind the vehicle. For vehicles with an automatic dimming rearview mirror, the mirror will ...