Q: What is LHD and RHD?

A: If a car is Left Hand Drive, the steering wheel is on the left if sat in the cabin. Left hand drive cars are found in countries that drive on the right of the road. Right Hand Drive cars feature the steering wheel on the right if sat in the cabin. These cars are found in countries which drive on the left of the road. UK vehicles are Right Hand Drive.

When looking at parts, RH and LH state which side of the vehicle the car fits as the image below shows!