Bus
Autobuses
Bus – the Bangkok Mass Transit Authority (BMTA) is responsible for providing bus services to people living and working in Bangkok and nearby provinces. BMTA operates over 100 routes, served by more than 3,000 buses (regular buses and air-conditioned). There are also privately-owned buses, and minibuses (both private and operated by the BMTA).
Regular buses cost 7 baht (cream-red), and 8 baht (white-blue). Expressway buses costs 8.5 baht. Air-conditioned buses (cream-blue) cost from 9 to 19 baht (depending on the distance travelled). All-night buses (cream-red) are 8 baht. EURO II buses (yellow-orange) cost anything between 12 to 22 baht, depending on the distance travelled.
See the following website for a map of the BMTA bus system:
https://www.transitbangkok.com/bangkok_buses.html