2011 Toyota Prius Owners Manual - Page 271

2-4. Using other driving systems n Operating conditions for each function "LKA" switch Cruise control (vehicle-to-vehicle distance control mode) Off On (While cruising in vehicle-to-vehicle distance control mode with the set vehicle speed approx. 45 mph [approx. 70 km/h] or less) On (While cruising in vehicle-to-vehicle distance control mode with the set vehicle speed approx. 50 mph [approx. 75 km/h] or more) Lane departure warning function*1 Available Lane keeping assist function*2 Not available 2 Available Not available When driving On Available Available *1: Vehicle speed is between about 30 and 124 mph (50 and 200 km/h). *2: Vehicle speed is between about 50 and 112 mph (75 and 180 km/h). 245 PRIUS_U (OM47685U) DVD