Civilian vehicles

Civilian vehicles were cars, starships, aircraft, or boats used by Civilians and designed to perform in a non-military combat capacity. Civilian security forces use their own types of vehicles. Civilian companies like the Liang-Dortmund Corporation as well have their own fleet of vehicles, some of which were paramilitary vehicles.

Automobiles
Some types of cars on Earth were required by law to use Roadware. Some types of automobiles also used gravity compensators.

Warthog

 * #550 Scuderia StarSpeed M-12R - also known as the "Rally Warthog", a racing-spec Warthog design.

Buses

 * Unnamed Arcadian bus - A type of six wheeled bus used on Arcadia.

Trucks/Vans

 * Dewmax - A Kabord manufactured van.

Cars

 * Fossa - A HuCiv two door vehicle used prominently on Andesia.

Motorcycles

 * Motor scooter

Industrial vehicles

 * Komodo - A six wheeled super-heavy all-terrain truck manufactured by Traxus Heavy Industries.

Aircraft/Spacecraft

 * Brahman light hauler - A small, cargo holding, flight capable craft manufactured by Oros Trading Company.

Trains/trams

 * Maglev train - A type of train that is propelled by magnetic levitation.

Motorboat

 * Abdel - A type of small boat with an outboard motor.

Ships

 * Unnamed large vessel - A very large waterborne vessel, that is not propelled by traditional boat propellers.

Submersible

 * Beta Gabriel submarine - A type of submarine used under the seas of Beta Gabriel.

Gameplay
Civilian vehicles generally appear as scenery objects in Campaign and Multiplayer of various Halo games.

Drivable
In Halo: Reach, a number of civilian vehicles are actually drivable. This includes the Cart, the S-2 Traxus Cargo Transporter, the Spade, and the HC1500. None of them have weapons and are quite easily destroyed. However the Spade actually allows Jorge-052 to stand on the rear platform and mount his chaingun to the roof.

In Halo 2: Anniversary's multiplayer, the Hog is a drivable vehicle.

Forge
A number of civilian vehicles appear as Forge Objects. In Halo 3, two vehicles appear as placable scenery items. In Halo 5: Guardians, three vehicles are forge objects; the Fossa, the Dewmax, and an unnamed truck.