Vection n. : Vectitation.

Example:
Finding a unit Vection in 2d?

Taxonomy
illusion, pilot, visual illusion, aircraft, runway, final approach, terrain, sensation, nose, Coriolis illusion, altitude, level flight, upsloping, inner ear, left turn, instruments, airplane, Sensory illusions in aviation.

Defination from the web:
... [edit] Vection illusion. A common example is when you are stopped at a traffic light in your car and the car next to you edges forward. ...