These are the scenes at Culverhouse Cross as some concede travelling by foot is probably faster - and safer - than by car.
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Although there'll be some clear spells in the east at first, it will be a rather cloudy night, with mist thickening over western hills.
Officers say the victim has been left shaken and traumatised by the incident.
Scott Bessant has been in a coma for a year, after being found in a lane near Pontypool, after a night out.