2010 Toyota Prius Owners Manual - Page 264

2-4. Using other driving systems Indication on the multi-information display While the LKA system is on, the lane line display and steering wheel display (in case of lane keeping assist function) are shown on the multi-information display to inform that the LKA system is on. Steering wheel display The lane keeping assist function is active. Dynamic radar cruise control display Lane line display ITO24P133 When thin lines are shown: A lane marking is not recognized by the system, or the LKA system functions are temporarily canceled. (When the lane keeping assist function is canceled, buzzer will beep twice.) When solid lane lines are shown: The lane departure warning function is active. 238