includes, as a bare minimum, car parks and public toilets. Most laybys also include public telephones and a small rest hut. Depending on location, laybys can also include petrol stations, a surau, and rarely, food courts, independently operated restaurants and automated teller machines. Full rest and service areas have all of the above services and are much larger, so they can accommodate more services. Several rest areas also have small inns, and most have complimentary Wi-Fi services. Vista points only have car parks and are meant for commuters to enjoy the scenery at that location. Laybys are found every 25 to 50 kilometres, while full rest areas are found every 80 to 100 kilometres. The only vista point on this expressway is in Pedas Linggi. History Original route The construction of the North-South Expressway includes the acquisition and upgrades of several major roads as follows:- Development Six-lane widening works The Senawang Interchange and the Ayer Keroh Interchange received new four lane sections in 2003. The Ayer Keroh Interchange had two-lane carriageways until 2009, when it was upgraded to three and four lanes, ending at Sungai Besi commencing again at E37 Kuala Lumpur–Seremban Expressway. Phase 1: Seremban–Senawang In July, 2007, a six lane section from Kuala Lumpur to Seremban Interchange Exit 218 was extended to Senawang Interchange Exit 220. Phase 2: Seremban–Ayer Keroh The next phase of these works, the extension of the Senawang Interchange Exit 220 to the Ayer Keroh Interchange Exit 231 was completed in December, 2007. Fourth lane addition In July 2010, the operator, PLUS Expressways Berhad, announced that the government had awarded contracts to build a fourth lane on a stretch from Nilai (North) to Seremban. The construction was completed in 2015. Exit 236 Bukit Gambir Interchange An interchange between Tangkak and Pagoh Interchange was opened to traffic on 26 January 2014, there will be three interchange that will be linking from the interchanges to Muar, Johor. Exit 217 Bandar Ainsdale (Seremban North) Interchange An interchange between Nilai and Seremban Interchange was opened to traffic on 10 July 2015, there will be four interchange that will be linking from the interchanges to Seremban, Negeri Sembilan. Exit 212A Southville City Interchange An interchange between Bangi and Putra Mahkota Interchange was opened to traffic on April 11, 2018, there will be five interchange that will be linking from the interchanges to Bangi, Selangor. Junction list References External links PLUS