The road is no place for surprises, and Garmin 560LT keeps you informed of upcoming road conditions, such as sharp curves and high winds, and restrictions, including no trailer or hazardous materials. A grade data field that appears on the map enables drivers to anticipate descents and ascents and shift accordingly. Trucking speed limits appear if they are lower than the posted automotive speed limit, and you have the ability to correct the speed limit on your 560LT so you have the most accurate data at all times.