1, mainly serves Tanjung Malim over in the previous state. From this point, route 1 leaves the vicinity of the expressway as the expressway goes southwards and the federal route goes southeast. The expressway interchanges with several rural roads at Lembah Beringin, Bukit Tagar, the Bukit Beruntung industrial area and at Sungai Buaya. Going southwards, the expressway leaves the Hulu Selangor district into the Gombak district, where it interchanges near the Rawang industrial area with route 3209. Shortly after, the Guthrie Corridor Expressway (expressway 35) begins as an interchange on this expressway. On the last segment, the expressway interchanges with a road next to the Sungai Buloh Hospital, crosses into the Petaling district, interchanges with the Sungai Buloh Highway (route 54) at Sungai Buloh, and finally terminates at its interchange with the New Klang Valley Expressway (which is also designated the route number E1) near Segambut in the north-western part of the Federal Territory Kuala Lumpur. Restricted routes for heavy vehicles As the route joins with the New Klang Valley Expressway, a restricted route has been implemented on the North–South Expressway Northern Route between Sungai Buloh and Bukit Lanjan during workdays or peak hours. Heavy vehicles (except buses and tankers) with laden and unladen heavy vehicles weighing 10,000 kg or more are not allowed to enter the expressway between 6:30 am until 9:30 am on Monday to Friday (except public holidays). A compound fine will be issued to heavy vehicles which flout the rule. Speed limits Most of the expressway enforces a maximum speed limit of . Signed exceptions include: when approaching any toll plaza on the route 1 concurrency (from Bukit Kayu Hitam to Jitra North) due to the presence of at-grade intersections on the Penang toll-free section (from Sungai Dua to Juru) due to heavy urban traffic between Kuala Kangsar and Jelapang where the expressway goes uphill, through a tunnel and then downhill on express lanes and on local lanes in the Ipoh local-express system; and on the stretch passing through Gua Tempurung, between Gopeng and Tapah. There are no signed minimum speed limits. Tolls Most of the expressway maintains a ticket system (closed system) of tolling. The expressway however also has two toll plazas using the barrier toll system (open system) at the Bukit Kayu Hitam checkpoint (demolished and takeover by JKR Kedah) and at Jitra. The ticket system from Juru southwards uses an integrated system of