Mazda 3 Quick Manual page 23

When Driving
Setting the Mazda Radar Cruise Control (MRCC)
How to Set the Speed
1. Adjust the vehicle speed to the desired setting using the accelerator pedal.
2. Headway control begins when the SET + or SET - switch is pressed. The set
speed and the inter-vehicle distance display filled with white lines are displayed.
Travel status
Active driving
display
How to Set the Distance Between Vehicles During Headway Control
The distance between vehicles is set to a shorter distance each time the
pressed. The distance between vehicles is set to a longer distance by pressing the
switch. The distance-between-vehicles can be set to 4 levels; Long, medium, short,
and extremely short distance.
Distance-between-
vehicles guideline
(at 80 km/h (50 mph)
vehicle speed)
Active driving
display
22
For details, refer to Section 4, "i-ACTIVSENSE".
During travel at constant
speed
Long Medium
(about 50 m (about 40 m
(164 ft))
(131 ft))
During travel under headway
control
Extremely
Short
(about 30 m
(about 25 m
(98 ft))
(82 ft))
switch is
short