Taxis and bus numbers 7, 8, 37, 49 and 75 will take you into Chinatown, but the advised mode of transport is a river boat. Traffic around the area is fairly congested. Tha Ratchawong Pier is a few hundred metres walk from Yaowarat road and Sampeng Lane. Boats can be caught from Saphan Taksin and Banglamploo Piers.
Get off at Hua Lum Phong MRT (underground) station. Cross the bridge at Hua Lum Phong train station and walk 5 - 10 minutes (300 metres) to the Commenorative Arch where Yarowat Rd and Charoenkung Rd start.