Honda Civic 2017 Owner's Manual page 435

uuWhen DrivinguCruise Control *
Take your foot off the accelerator pedal and press the –/SET button when you reach
the desired speed.
The moment you release the –/SET button, the set speed is fixed, and cruise control
begins. The CRUISE CONTROL indicator comes on.
When you use cruise control, Straight Driving Assist (a feature of the Electric Power
Steering system) is activated.
By enabling the steering system to automatically compensate for natural steering
pull, Straight Driving Assist makes it easier for you to keep your vehicle in a straight
line.
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