A weather warning has been issued for South Yorkshire today - with fog expected during rush hour.
Areas of fog, including some dense freezing fog patches with visibility of less than 100 metres, are set to form around early evening, affecting rush hour.
The fog is expected to remain through the night and into tomorrow morning
A Met Office spokesman said: "Please be aware of likely tricky road travel conditions.
"With little cloud and light winds, fog is expected to readily develop during Monday evening, affecting the evening rush hour in some areas as well as the morning rush hour on Tuesday. "Fog is then expected to be locally slow to lift and clear on Tuesday, lingering for much of the morning and perhaps onwards into the afternoon in some spots."
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