Side-by-side (vehicle)

ANSI/OPEI B71.9-2016 sets standards for multipurpose off-highway utility vehicles (MOHUV) specifically intended for utility use which are intended to transport persons and cargo, have a non-straddle seat, are designed to travel on four or more wheels, use a steering wheel and pedals for controls, have a top speed of at least 25 mph (40.2 km/h), are 2030 mm (80 in) or less in overall width, have a gross vehicle weight rating (GVWR) of no more than 1814 kg (4000 lb), and with a minimum cargo capacity of 159 kg (350 lb).

[7] ANSI/ROHVA 1-2016 sets standards for recreational off-highway vehicles as having speed capability greater than 30 MPH (48 km/h), GVWR no greater than 1700 kg (3750 lbs), and engine displacement equal to or less than 1,000cc (61 cubic inches) for gasoline fueled engines.

In 2021 Dakar Rally organizers and the FIA introduced common categories - Group T3 for light prototypes and Group T4 for production based side by side vehicles.

Other off-road racing series include side-by-side classes, such as the Lucas Oil Off Road Racing Series, TORC: The Off-Road Championship, SCORE International, Best in the Desert, and Grand National Cross Country.

[13] The US Marines are amongst other military forces to utilise forms of side-by-sides such as Polaris RZR.