2012 Toyota Prius Owners Manual - Page 514

2 -1 . Driving proc e dure s Tur n signa l leve r The turn signal lever can be used to show the following intention of the driver: Right turn Left turn Lane change to the right (push and hold the lever partway) The right hand signals will flash until you release the lever. 2 When driving Lane change to the left (push and hold the lever partway) The left hand signals will flash until you release the lever.