Toyota PRIUS Owner's Manual page 355

Example of constant speed cruising
1
When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-
vehicle distance can also be set by operating the vehicle-to-vehicle dis-
tance control.
Example of deceleration cruising and follow-up cruising
2
When a preceding vehicle driving slower than the set speed
appears
When a vehicle is detected running ahead of you, the system automatically
decelerates your vehicle. When a greater reduction in vehicle speed is
necessary, the system applies the brakes (the stop lights will come on at
this time). Approach warning warns you when the system cannot deceler-
ate sufficiently to prevent your vehicle from closing in on the vehicle ahead.
Example of acceleration
3
When there are no longer any preceding vehicles driving slower
than the set speed
The system accelerates until the set speed is reached. The system then
returns to constant speed cruising.
PRIUS_OM_OM47A31E_(EE)
4-5. Using the driving support systems
355
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