The first freeway to be built in Honolulu was the King Lunalilo Freeway (originally Rt.72, now H-1). It was started at what  is now the Waialae-Kapahulu on-ramp in 1954. In 1960, the Hawaii congressional delegatio‭n got the Hawaii Omnibus Act passed through Congress. It allowed for federally-funded freeways to built outside the mainland. That created the H-1, H-2 and H-3 that we know today and later added the Moanalua Freeway (Rt. 78) as H-201 in 1990.