Traffic was moving slow near Buzz’s Steakhouse in Lanikai late Thursday afternoon, as workers fix a broken 6-inch water main at Lihiwai Road.
The Kailua-bound lane on Lihiwai Road near Makalii Place was closed.
The opposite lane was being used for contraflow traffic in and out of Lanikai.
Kailua Beach Park and 17 customers are without water service, the Honolulu Board of Water Supply said Thursday afternoon.
Water supply officials said work is expected to continue overnight to reopen the road.