At Haleʻiwa, Kamehameha Highway becomes state route 99 (at the traffic circle known as “Weed Circle”), which runs eastward up across the Oʻahu central plateau to Wahiawā. A new bypass route (Joseph P. Leong Highway) avoids both the traffic circle and Haleʻiwa, extending state route 83 to just north of Haleʻiwa town. Haleʻiwa Road and both Kaukonahua Road and Waialua Beach Road from Weed Circle go south and southwest into Waialua across Paukauila Stream.
