The NRP stopped about 600 vehicles during R.I.D.E. programs in St. Catharines and Port Colborne.
Officers administered 26 roadside screening tests on Monday and four drivers found themselves in the warning range.
They each face a three-day licence suspension.
The officers also issued tickets for traffic related offences.
St. Catharines Trying for Development Near Hospital
It has to do with a vacant lot, and quest for residential properties
NRP Release Robbery Suspects Pics
Roberts Jewellery in Niagara Falls robbed last month
Update: Police Charge Another Man, Other Charges Dropped
Police say man was stabbed while sitting on Niagara Falls park bench
Speed Cameras Considered Near Schools
This is in Welland, where city council heard there are too many complaints of speeding
Grimsby Council Pay Reviewed
Councillors voted for an outside independent body to do it, some disagreed saying it's not necessary
NRP Find Missing Senior
Police say Wayne Gillis is safe
Update: Suspect Wanted for Murder
Police say the victim recently died in hospital
Val Kilmer Dead at 65
The actor died of pneumonia on April 1st.