A collision between a truck and a bicyclist near Pearlridge Center in Aiea last night left the 53-year-old bicyclist in critical condition, police said.

The man was riding a 2005 Giant, 21-speed, black and gray mountain bike when he crossed the intersection of Moanalua Road and Kaamilo Street against the crosswalk signal at 9:24 p.m., police said.

The 46-year-old driver of a 1994 Ford F-150 pick-up truck did not see the bicyclist enter the intersection, police said.

The collision threw the bicyclist onto the hood of the pickup truck and pinned the bicycle underneath, police said.

Speed and alcohol were not factors on the part of the truck driver, police said. They did not know whether speed and alcohol were factors on the part of the bicycle rider.

Police temporarily closed the intersection to investigate the crash and diverted traffic to alternate streets.