The “Purple Line” project covers the MRTA Line from Khlong Bang Phai to Bang Sue. Within this project the section from Khlong Bang Phai to Tao Poon station, covered by this Sub-Contract Technical Specification, is called the Purple Line and the M&E works are covered under Contract No. 4. The section from Bang Sue to Tao Poon is called the Extension of the Initial Blue Line and is covered by M&E Contract No. 5.