Taxi marshals have started operating in Beverley and Bridlington.
Marshals are warning people about getting into bogus taxis and stopping booze-fuelled flare-ups in queues.
They started work last night, when East Riding Council's licensing officers also carried out spot-checks on taxi and private hire drivers to stop any operating illegally.
Councillor Jackie Cracknell said: "The East Riding has a reputation for being a safe place to be out and about. We want everyone to enjoy themselves while staying safe.
"For the fourth year, the marshals will be a reassuring presence working alongside the council's licensing officers, helping manage large queues and keeping things calm."
The marshals will be operating in both towns until Thursday, January 1.
Cllr Cracknell said: "We are talking about a small element of unlicensed drivers who either hold no licence or attempt to accept passengers when they are not legally entitled to.
"Our advice is to plan ahead and book or only get in a taxi where the driver is wearing a council-issued identity badge."
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