The southern section of the E1 forms most of the North Luzon Expressway, a four- to eight-lane limited-access toll expressway that connects Metro Manila to the provinces of the Central Luzon region in the Philippines. It was built in the 1960s and is 84 kilometers (52 mi) long.
The central section of the E1 forms part of the Subic–Clark–Tarlac Expressway, a 93.77-kilometer (58.27 mi) four-lane expressway built by the Bases Conversion and Development Authority (BCDA), a government-owned and controlled corporation under the Office of the President of the Philippines. The Subic–Clark–Tarlac Expressway (SCTEX) is the country's longest expressway at 93.77 kilometers (58.27 mi). Construction of the expressway started on April 5, 2005, while commercial operations started on April 28, 2008, with the opening of the Subic-Clark Segment and Zone A of the portion of the Clark-Tarlac Segment. The opening of Zones B and C of the remaining Clark-Tarlac Segment on July 25, 2008, signaled the full operation of the SCTEX.
The northern section of the E1 forms the Tarlac–Pangasinan–La Union Expressway, an 89.21 kilometers (55.43 mi) four-lane expressway north of Manila, in the Philippines. It connects central to northern Luzon,[2] with its southernmost terminal in Tarlac City, Tarlac and its planned northernmost terminus currently slated to be at Rosario, La Union.[3][4]
The first section, from Tarlac City to Pura, Tarlac, operated on a "soft opening" basis from October 31, 2013, until full operations began in November 2013.[5]
Part of the second segment, which will take motorists up to Ramos, Tarlac, opened on December 23, 2013. The remaining section from Anao, Tarlac to Rosales, Pangasinan, opened on April 16, 2014, and the final section ending in Rosario, La Union was completed in July 2020.[3][4]
Proposals have also been raised to extend the project to Laoag in Ilocos Norte.[2]