Apart from the Jitra–Bukit Kayu Hitam section that was being upgraded to be a part of the North–South Expressway E1, there are some other sections of the FT1 highway that have been upgraded to toll roads and controlled-access expressways. For example, the Skudai Highway FT1 was completed in November 1985 as a tolled divided highway until 1 March 2004. Meanwhile, Jalan Cheras–Kajang FT1 was upgraded from the former 2-lane road into an 8-lane controlled-access expressway known as the Cheras–Kajang Expressway E7/FT1. The expressway was opened to traffic on 15 January 1999.