The constitutional reform bill was approved overnight with 339 votes in the 550-member assembly.
“My people will give the final decision… I believe this referendum period will conclude with the will of our people,” said Erdoğan.
The legislation aims to bring stability at a time of turmoil and unrest, and prevent the fragile coalitions of the past.
Erdoğan said the metro line will be further developed to span across even more of Istanbul.
“The Kadıköy-Tavşantepe metro line that we are opening today expands Istanbul’s rapid transit line of the metro to 150 kilometers. The part of the line that extends to Sabiha Gökçen Airport will be completed by 2019. It is our aim to expand Istanbul’s metro line to 260 kilometers,” he said.
The President also spoke about the rocket attacks that were launched on the ruling Justice and Development (AK) Party’s local headquartes on Friday.
“They can attack AK Party as much as they want. We have devoted all we have to this path,” he said.
The AK Party provincial head, Selim Temurci, reported that the rocket did not explode despite piercing the wall of the building and pointed to the involvement of the ultra-left Revolutionary People’s Liberation Party-Front (DHKP-C).