The City of Lincoln Council says a new one-way system around the annual Christmas market is necessary to deal with the huge crowds that attend.
Spokesperson John Latham says this year's event from the 6-9th December will be safer because of the change.
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It will be largely dry but some fog may be slow to clear.
Any fog patches slow to clear during the morning.
The Fire and Rescue service were called to Lynmouth Close in Leicester on Friday night.