North Liverpool Extension Line was created in 1880.
Jubilee Line Extension was created in 1999.
North London Line was created in 1869.
Far North Line was created in 1874.
North-Link Line was created in 1979.
North Downs Line was created in 1849.
North South MRT Line was created in 1987.
North Western Refrigerator Line was created in 1924.
North East railway line was created in 1860.
North East MRT Line was created in 2003.
Mirboo North railway line was created in 1885.
Is it possible that extension line is meant?
The Purple Line Extension is a subway line formerly known as the Westside Subway Extension. In the future it will extend the Purple Line to the Westside.