The burst main is on St Andrews Road adjacent to the Asda Distribution Centre and is causing localised flooding and congestion.
Bristol Water is attempting to control the leak by throttling the valves, although this is being held up by traffic attempting to continue to drive through the water.
A repair crew and a traffic management team is en route to co-ordinate setting up a safe area in order to make a repair. The crew will take ice signs and some salt to grit the road and we are appealing to motorists to either avoid or drive carefully past the work. There is a high possibility of excess water freezing later this evening.
Once Bristol Water has assessed the damage to the main they will work to repair it as soon as possible and reinstate the road surface. Bristol Water apologises to all those affected by this burst main.