Al Tayer made the announcement during a tour made to inspect the work progress on some of the 20 Green Line stations, of which six will be underground.
The Green line is the second line of the Dubai Metro and will be a 22.5km line comprising 40 trains that will run from Dubai Airport Free Zone to Dubai Healthcare City (DHCC) through Saeediya and comprises two interchange stations with the Red Line, at Union Square and Burjuman.
A car park for 6,000 cars will be constructed at Al Qusais Depot.
The RTA is also thought to be considering extending the Green Line from the Academic City to the International City.
In a statement, Al Tayer expressed his delight with the progress being made and "commended the efforts of all personnel working tirelessly to complete the project".