Question

which of these would you use to communicate a lateral lane change?

Explanation:

Identify the communication device for lane changes

The turn signal lever (typically located on the left side of the steering column) is the primary vehicle control used to communicate a lateral lane change to other road users.

Locate the control in the vehicle cabin

In the provided interior image, the turn signal lever is mounted on the left side of the steering column behind the steering wheel.

Answer:

The turn signal lever (located on the left side of the steering column).