These pics are in Kowloon side, not New Territories or Hong Kong Island. If weather is better, you can see HK Island at far.
I think some younger member here dun know Hong Kong was British Colony before 1997. That's why we drive on the right side. We still have many road sign which is British style I guess. China do have LHD. Some business people from HK do drive their RHD car to China and drive on the other side.
BTW, Japan is also RHD, but you may see some LHD car foreign car there becos some model they really love only produce in LHD. We do have some rich people in HK who drive LHD car in HK with special "T" plate on it. It is for car test only. But they use it for driving in HK (but mostly you won't see those. Maybe track day in China). For example, Enzo.
Hong Kong is a special area. People from China need to apply a permit to come to Hong Kong.