Toyota RAV4 Owner's Manual page 318

318
4-5. Using the driving support systems
CAUTION
 Before using the LDA system
Do not rely solely on the LDA system. The LDA system does not drive the
vehicle automatically, nor does it reduce the amount of care you need to
take. As such, the driver must always assume full responsibility for under-
standing his/her surroundings, for operating the steering wheel to correct
the driving line, and for driving safely.
Inappropriate or negligent driving could lead to an accident.
 To avoid operating the LDA by mistake
Switch the LDA system off using the LDA switch when not in use.
Situations unsuitable for LDA system

Do not use LDA system in any of the following situations.
Otherwise, the system may not function correctly and could result in an
accident.
 When driving with tire chains, a spare tire, or similar equipment
 When there are objects or structures along the roadside that might be mis-
interpreted as lane markers (such as guardrails, curb, reflector posts, etc.)
 When driving on snowy roads
 When pavement lane markers are difficult to see due to rain, snow, fog,
sand, dirt, etc.
 When there are visible lines on the pavement from road repairs, or if the
remains of old lane markers are still visible on the road
 When driving on a road with lane closures due to maintenance, or when
driving in a temporary lane
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