Mirror Adjustment. Mirror adjustment should be checked prior to the start of any trip and can only be checked accurately when the trailers) are straight. You should check and adjust each mirror Section 2 – Driving Safely Page 2-10 Version: July 2013
2005 Commercial Driver’s License Manual to show some part of the vehicle. This will give you a reference point for judging the position of the other images. Regular Checks. You need to make regular checks of your mirrors to be aware of traffic and to check your vehicle. Traffic. Check your mirrors for vehicles on either side and in back of you. In an emergency, you may need to know whether you can make a quick lane change. Use your mirrors to spot overtaking vehicles. There are "blind spots" that your mirrors cannot show you. Check your mirrors regularly to know where other vehicles are around you, and to see if they move into your blind spots.