These are typically used on the rear axle or wheels of vehicles, but also found in both front and main landing gear of aircraft.
Trailing-arm designs in live axle setups often use just two or three links and a Panhard rod to locate the wheel laterally.
A twist-beam rear suspension is very similar except that the arms are connected by a beam, used to locate the wheels and which twists and has an anti-roll effect.
Trailing-arm and multilink suspension designs are much more commonly used for the rear wheels of a vehicle where they can allow for a flatter floor and more cargo room.
Many small, front-wheel drive vehicles feature a MacPherson strut front suspension and trailing-arm rear axle.