If travelling from Riverside travel on road 217 (Samdech Monireth Boulevard) and go past the intersection with 271. That is where the flyover is. Go along road 217 past the Stung Meanchey pagoda. Keep going until you see a sign on the left RHB - Indochine bank. Turn left and go to the end of the street and you will be at PIO. The road is just before the Nonmony pagoda. If travelling in the opposite direction along 217 (Samdech Monireth Boulevard) the road to PIO is just past the New Stung Meanchey market and near the Nonmony pagoda. When you go past the Nonmony pagoda you will see a Maybank and an Indochine bank. Turn right. At the end of that road is PIO.