With classes back in session Tuesday, drivers are being reminded to slow down in school zones.
Sarnia police Constable John Sottosanti says school zones have been quiet for the past couple of months, but that's no longer the case.
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Motorists are also reminded they're required to stop for school buses with stop arm activated and lights flashing.
Failure to do so can result in a fine and six demerit points for a first offence.