Lane Assist • Visibility is poor and lane markings are not • One or more of the ultrasonic sensors is clearly visible (due to heavy rain, snow, damaged, dirty, or obstructed (such as by fog, etc.). The exact detection zone of the mud, ice, or snow). ultrasonic sensors vary depending on • Weather conditions (heavy rain, snow, fog, environmental conditions. or extremely hot or cold temperatures) • Bright light (such as from oncoming are interfering with sensor operation. headlights or direct sunlight) is interfering • The sensors are affected by other with the view of the camera(s). electrical equipment or devices that • A vehicle in front of Model 3 is blocking generate ultrasonic waves. the view of the camera(s). • An object mounted to Model 3 (such as a • The windshield is obstructing the view of bike rack or a bumper sticker) is the camera(s) (fogged over, dirty, covered interfering with or obstructing a sensor. by a sticker, etc.). • Visibility is poor and lane markings are not • Lane markings are excessively worn, have clearly visible (due to heavy rain, snow, been adjusted due to road construction, fog, etc.). or are changing quickly (for example, • Lane markings are excessively worn, have lanes branching off, crossing over, or been adjusted due to road construction or merging). are changing quickly (for example, lanes • The road is narrow or winding. branching off, crossing over, or merging). • Objects or landscape features are casting Warning: The lists above do not represent strong shadows on lane markers. every possible situation that may interfere Lane Assist may not provide warnings, or may with Lane Assist warnings. Lane Assist apply inappropriate warnings, in these may not operate as intended for many situations: other reasons. To avoid a collision, stay • One or more of the ultrasonic sensors is alert and always pay attention to the damaged, dirty, or obstructed (such as by roadway when driving Model 3 so you can mud, ice, or snow). anticipate the need to take corrective action as early as possible. • Weather conditions (heavy rain, snow, fog, Caution: If a fault occurs with the Lane or extremely hot or cold temperatures) Assist system, Model 3 displays an alert. are interfering with sensor operation. Contact Tesla Service. • The sensors are affected by other electrical equipment or devices that generate ultrasonic waves. • An object that is mounted to Model 3 is interfering with and/or obstructing a sensor (such as a bike rack or a bumper sticker). In addition, Lane Assist may not steer Model 3 away from an adjacent vehicle, or may apply unnecessary or inappropriate steering, in these situations: • You are driving Model 3 on sharp corners or on a curve at a relatively high speed. • Bright light (such as from oncoming headlights or direct sunlight) is interfering with the view of the camera(s). • You are drifting into another lane but an object (such as a vehicle) is not present. • A vehicle in another lane cuts in front of you or drifts into your driving lane. • Model 3 is traveling slower than 30 mph (48 km/h) or faster than 90 mph (145 km/h). 74 Model 3 Owner's Manual