The Pan-Philippine Highway, also known as the Maharlika Highway (Tagalog: Daang Maharlika; Cebuano: Dalang Halangdon), is a network of roads, expressways, bridges, and ferry services that connect the islands of Luzon, Samar, Leyte, and Mindanao in the Philippines, serving as the country's principal transport backbone.

Measuring 3,379.73 kilometers (2,100.07 mi) long excluding sea routes not counted by highway milestones, it is the longest road in the Philippines that forms the country's north–south backbone component of National Route 1 (N1) of the Philippine highway network.

[5][6][7] Government planners believed that the motorway and other connected roads would stimulate agricultural production by reducing transport costs, encourage social and economic development outside existing major urban centers such as Manila, and expand industrial production for domestic and overseas markets.

Construction, which continued in the following decades, was supported by loans and grants from foreign aid institutions, including the World Bank.

[9] Japan's assistance is applied only up to Carmen, Davao del Norte at the south, thus covering only about 2,100 kilometers (1,300 mi) or about 62% of the highway's entire length.