What is North South MRT line?
{{Infobox rail line | box_width = width:12em; | name = [[File:MRT Singapore Destination 4.svg|25px]] [[File:MRT Singapore Destination 5.svg|25px]] <br />North South line | color = {{SMRT color|North South}} | native_name = Laluan MRT Utara Selatan<br />{{lang|zh|南北地铁线}}<br />{{lang|ta|வடக்கு தெற்கு எம்ஆர்டி வழி}} | logo = File:North South Line logo.svg | logo_width = | image = NS15 Yio Chu Kang Station.jpg | image_width = 300px | caption = [[Yio Chu Kang MRT Station|Yio Chu Kang]] is one of the oldest stations of the line. | type = [[Rapid transit]] | system = [[Mass Rapid Transit (Singapore)]] | status = Operational<br>Under planning ([[Brickland MRT station|Brickland]] and [[Sungei Kadut MRT station|Sungei Kadut]]) | locale = | start = [[Jurong East MRT Station|Jurong East]] | end = [[Marina South Pier MRT Station|Marina South Pier]] | stations = 27 (Operational)<br>2 (Under planning) | routes = 1 | daily_ridership = | open = {{start date and age|df=yes|1987|11|07}} | close = | owner = [[Land Transport Authority]] | operator = [[SMRT Trains]] ([[SMRT Corporation]]) | character = Above ground ([[Jurong East MRT Station|Jurong East]] - [[Ang Mo Kio MRT station|Ang Mo Kio]])<br>Surface level ([[Bishan MRT Station|Bishan]])<br>Underground ([[Braddell MRT Station|Braddell]] - [[Marina South Pier MRT station|Marina South Pier]]) | stock = [[Kawasaki Heavy Industries C151|C151]]<br>[[Siemens C651|C651]]<br>[[Kawasaki Heavy Industries & Nippon