High Quality Content by WIKIPEDIA articles! North–South Expressway (NSE) Southern Route, AH2 AH2 is the southern part of the North–South Expressway, which is the longest expressway in Malaysia. It is joined by the , and continues southward. The expressway is oriented in a north–south direction, traversing four states in Peninsular Malaysia; namely Selangor, Negeri Sembilan, Malacca and Johor.