From Lamai: stay on the main ring road go direction Nathon. Pass Hua Thanon pass the prison. You will see the new court/municipal building on the cliff on the right. Look for the HHH sign about 50 metres further on the right, turn.
From Nathon: go direction Lamai about 50 metres before the new court/municipal building on the cliff you will see the HHH sign on your left, turn. If you get as far as t he court building, go in and pay your fine then turn back and find the sign.