Central Spine Road (CSR) or Kuala Krai–Kuala Pilah Highway, Federal Route 34, is a new toll-free highway under construction in the center of Peninsular Malaysia. The 325 km (201 miles) highway is built to eventually replace the former two-lane Federal Route 8 Gua Musang Highway and Federal Route 9 Karak–Tampin highway. Construction of CSR starts at Package 3 which is from Merapoh to Kampung Relong. It commences at Package 3 as the Gua Musang Highway passes through Chegar Perah which is prone to roadkill. The highway has a long eco-viaduct built in this section. Package 5 which is from north Raub to Karak will be built next, which will connect it to E8 Kuala Lumpur–Karak Expressway bypassing Bentong and . This will help detour traffic from the steep mountainous grade between Raub and Benton