The steering and suspension systems of a heavy goods vehicle (HGV) are responsible for providing stability, control, and comfort while driving. The steering system allows the driver to control the direction of the vehicle by turning the front wheels. It typically consists of a steering wheel, a steering column, a steering box or rack, and a linkage that connects the steering components to the front wheels. The suspension system is responsible for absorbing the impact of the road and providing a smooth ride. It typically consists of a combination of springs and shock absorbers that are connected to the frame of the vehicle and the wheels. The springs compress and expand as the vehicle moves over the road, while the shock absorbers help to dampen the vibrations and movements of the suspension. Together, the steering and suspension systems work to provide the driver with a comfortable and stable driving experience, while also ensuring the safety of the vehicle. They help to keep the tires in contact with the road, which improves traction and reduces the risk of skidding or rolling over. They also play an important role in maintaining the stability and handling of the vehicle. It's important to keep these systems in good working condition by regular maintenance, inspections, and adjustments as recommended by the vehicle manufacturer. Worn out or damaged components can cause the vehicle to handle poorly, increase wear on the tires and suspension components, and make the ride more uncomfortable.