Lexus RC F 2015 Owner's Manual page 307

RCTA function detection areas
The areas that vehicles can be detected in are outlined below.
The buzzer can alert the driver of faster vehicles approaching from farther away.
Example:
Approaching vehicle
Fast
Slow
The RCTA function is operational when
■
The RCTA function operates when all of the following conditions are met:
The BSM main switch is on.
●
The shift lever is in R.
●
The vehicle speed is less than approximately 5 mph (8 km/h).
●
The approaching vehicle speed is between approximately 5 mph (8 km/h) and 18 mph
●
(28 km/h).
RC350/RCF_U (OM24636U)
4-5. Using the driving support systems
Speed
18 mph (28 km/h)
5 mph (8 km/h)
I n f o r ma t i o n P r o v i d e d b y :
307
Approximate
1 4
alert distance
65 ft. (20 m)
18 ft. (5.5 m)