Sector-wise, the average annual growth of electricity demand would be the highest in transport sector (6.4%), followed by commercial (5.1%), industry (4.3%), residential (3.5%) and agriculture (1.6%) sectors (Table 4). Although the share of transport in total electricity demand is small in absolute value, the highest growth of electricity demand in transport sector is due to Thailand’s plan of extending the current electricity operated mass transit rail system from around Bangkok city area to Greater Bangkok area. Industry sector is estimated to remain the largest final consumer of electricity during 2000–2040, with its consumption increasing from 39TWh (45%) in 2000 to 247TWh (44%) in 2040. In 2050, however, the share of commercial sector in total electricity demand is estimated to be the largest (44%), followed by industry (42%) and residential (14%) sectors.