Toyota 2015 Prius Owner's Manual page 214

Setting the vehicle speed (vehicle-to-vehicle distance control
mode)
1
Press the "ON-OFF" button to
activate the cruise control.
Radar cruise control indicator will
come on.
Press the button again to deacti-
vate the cruise control.
2
Accelerate or decelerate the
vehicle to the desired speed,
and push the lever down to set
the speed.
"SET" indicator will come on. The
vehicle speed at the moment the
lever is released becomes the set
speed.
PRIUS v_OM_OM47887U_(U)
4-5. Using the driving support systems
I n f o r ma t i o n P r o v i d e d b y :
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