The MRT Orange Line (Thai: รถไฟฟ้ามหานคร สายสีส้ม) is a rapid transit line of the Mass Rapid Transit Authority of Thailand (MRTA) in the Bangkok Metropolitan Area, Thailand. When fully completed, the MRT Orange line will be 35.9 km long with 29 stations (7 stations will be elevated for 8.9 km and 22 will be underground for 27 km), including an interchange with the current Thailand Cultural Centre Station of MRT Blue Line). By the end of May 2022, construction had progressed to 94.51%. Western extension tender delayed