Police seized a car from a 15-year-old driver spotted going through three red lights in Sheffield.
The car was stopped on Brook Hill roundabout, Netherthorpe, at 1.25am yesterday.
A South Yorkshire Police spokeswoman said: "Goodness knows what might have happened if the driver had not been stopped.
"I am just glad that staff were there to stop them before they injured themselves, others or someone else's property.
"The child was taken home and enquiries are ongoing."