Gardai are urging drivers to slow down and to use their foglights as heavy dense fog covers much of the Shannonsid region.
Gardai in Carrick-on-Shannon, as well as Longford, are urging drivers to proceed with caution with visibility very poor in many areas.
The fog is expected to lift later in the morning and gardai are urging drivers to slow down and keep well back from any vehicles in front.
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