Final answer:
The deceleration lane is primarily used for getting off the road.
Step-by-step explanation:
The deceleration lane is primarily used for getting off the road. A deceleration lane, also known as an exit lane or an off-ramp, is a designated lane on a roadway that provides a space for vehicles to gradually reduce speed before exiting the main road. These lanes are typically found on highways, freeways, and other high-speed roads and are designed to enhance safety by allowing vehicles to exit the flow of traffic at a controlled and gradual pace.