Hawaii Route 31 begins in at an intersection with Hawaii Routes 310 and 311 in a census-designated place with at the 2010 census a population of what?
Hawaii Route 31: Hawaii Route 31, also known as the Pi'ilani Highway, is a 38-mile road on the island of Maui in the U.S. state of Hawaii. Kihei, Hawaii: Kīhei is a census-designated place (CDP) in Maui County, Hawaiʻ i, United States. Kihei, Hawaii:  The population was 20,881 at the 2010 census.
i don't know