Under certain circumstances, Lane Departure Alert (LDA)
is designed to detect lane departure on roads with visible lane markings. LDA only activates when you’re traveling at a speed of 32 mph or faster. When you hear and see the alert, after carefully checking the road around you, you should safely direct your vehicle back to the center of your lane. In addition, Prius's Toyota Safety Sense P (TSS-P)
and Electronic Power Steering (EPS) include Steering Assist (SA)
functionality. When it’s activated and senses that you’re unintentionally drifting, the system may automatically make small corrective steering inputs to help keep your vehicle in its lane.