Johor–Singapore Causeway
The Kilometre Zero of the Federal Route 1 is located at the former site of the now-demolished Tanjung Puteri CIQ Complex in Johor Bahru, where it connected to the Johor–Singapore Causeway at the Malaysia–Singapore border. Since 2008, it is no longer possible to access the Causeway by the Federal Route 1, when the new Sultan Iskandar CIQ Complex was opened with access to the border checkpoint provided by the Johor Bahru Eastern Dispersal Link Expressway.