BANGKOK -- A city known for traffic gridlock and confusing roads, Bangkok has been trying to improve traffic and the quality of life for its residents by rapidly expanding its rail system.
Subway system set to double with $9.5bn investment by 2023

Bangkok opened its first urban railway in 1999, a relatively early mover in Southeast Asia, but frequent political upheavals and economic fluctuations delayed expansion. (Photo by Akira Kodaka)
BANGKOK -- A city known for traffic gridlock and confusing roads, Bangkok has been trying to improve traffic and the quality of life for its residents by rapidly expanding its rail system.