Niagara Regional Police stopped 100 vehicles during the latest RIDE check in Port Colborne.
Officers set up in the Quarry Road and Pleasant Beach Road area on Friday from 5 p.m. until 11 p.m.
During that time, five roadside tests were conducted but no arrests or charges have been reported.
NPR officials say due to increased traffic at the Quarry and Pleasant Beach, extra officers will be on patrol and more RIDE checks will be set up in the future.