A Cab Roof Fairing is a roof fairing that extends partially over the cab of the truck with enclosed sides. It may not line up perfectly with the sides of the cab.

A cab roof fairing is a device that is attached to the roof of a vehicle, such as a truck or a bus, in order to improve its aerodynamics. Cab roof fairings are designed to reduce drag and improve fuel efficiency by smoothing out the airflow over the top of the vehicle.

Cab roof fairings are often used on vehicles that are used for long distance driving, as they can help to reduce fuel consumption and emissions. They are also sometimes used on buses and other public transit vehicles, as they can help to reduce fuel costs and improve the overall efficiency of the transit system.

Cab roof fairings are typically made of lightweight materials such as plastic or fiberglass, and they are attached to the roof of the vehicle using bolts or other fasteners. They can be an effective way to reduce the environmental impact of transportation, and they are often used in combination with other fuel-saving technologies such as low-rolling resistance tires and engine idle reduction systems.