Toyota RAV4 Owner's Manual page 357

The Rear Crossing Traffic Alert function detection areas
The areas that vehicles can be detected in are outlined below.
To give the driver a more consistent time to react, the buzzer can alert
for faster vehicles from farther away.
Example:
Approaching vehicle
Fast
Slow
 The Rear Crossing Traffic Alert function is operational when
 The BSM main switch is set to on.
 The shift lever is in R.
 Vehicle speed is less than approximately 8 km/h (5 mph).
Approaching vehicle speed is between approximately 8 km/h (5 mph) and

28 km/h (18 mph).
RAV4_OM_OM42873E_(EE)
4-5. Using the driving support systems
Speed
28 km/h (18 mph)
8 km/h (5 mph)
357
1 Approximate
alert distance
20 m (65 ft.)
5.5 m (18 ft.)
4