Visibility is an issue on roads in southern parts of the Quinte Region on Wednesday.
Environment Canada has issued a Fog Advisory (yellow) for a widespread area that includes Belleville, Quinte West, Prince Edward County, Brighton, Napanee and Kingston.
It does not include Centre and North Hastings.
Near visibility is expected at times as heavy fog blankets the region for the early morning hours.
Conditions are expected to improve slowly as the morning continues.
