Honda Civic Owners Manual: Lane Departure Warning Function

Lane Keep Support Function

Provides assistance to keep the vehicle in the center of the lane. When the vehicle nears a white or yellow line, steering force of the electric power steering will become stronger. ...

When the System can be Used

The system can be used when the following conditions are met.  The lane in which you are driving has detectable lane markers on both sides, and your vehicle is in the center of the lane. ...

See also:

Honda Civic Owners Manual. To Adjust the Vehicle Speed
Increase or decrease the vehicle speed using the RES/+ or -/SET buttons on the steering wheel. Each time you press the button, the vehicle speed is increased or decreased by about 1 mph (1.6 km/h). If you keep the button pressed, the vehicle speed increases or decreases until yo ...