Research from the Asphalt Industry Alliance (AIA) found that just 51% of the local road network that is maintained by local councils were reported by those authorities to be in good condition. It said roads were only being resurfaced, on average, once every 97 years, and that almost one in six local roads – equivalent to over 32,500 miles – had less than five years' structural life remaining. The survey was completed by 79% of councils whose answers suggested extra investment to tackle potholes has failed to deliver "noticeable improvements". The report said that nearly two million potholes were filled in over the past year, but local authorities would have needed more than £8m extra each last year just to maintain their networks at target levels and prevent further decline. Last month, the AA said pothole-related call outs in January were up by 18% across the UK, with 6,235 in the east of England alone. he added "the dial could be moved quicker" if the additional funding came quicker rather than "ramping up in the years to 2030".