A 31-year-old man was critically injured after a scooter he was operating struck a vehicle in Kalihi Tuesday.

The collision occurred in the area of Kalihi Street and Palanehe Place at about 4:05 p.m.

Honolulu police said a 54-year-old motorist traveling northbound on Kalihi Street was turning into a private residential driveway when a scooter traveling southbound on the roadway at a high rate of speed broadsided him.

The scooter rider was thrown onto the roadway upon impact. Police said he was taken in critical condition to a hospital.

He was not wearing a helmet at the time of the crash.

Police said the 54-year-old motorist was not injured.

Speed was a factor in the collision, police said. It”s. unknown whether drugs or alcohol were factors.