AIA chairman Alan Mackenzie said emergency funding from the Government would be "welcome" when dealing with potholes, but spending money "here and there" makes "little difference."
He added that the £215 million announced in the autumn to improve road conditions "doesn't even cover the £338 million" of repair needed from last year's rainfall.
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Dashcam footage captured the tree crashing down onto 40-year-old Sarah Robb's BMW just after she left her home in Syston on Thursday.
The teenagers, aged 19 to 15, appeared in custody at Westminster Magistrates' Court on Saturday, supported by their families.
Labour must "broaden its reach" in order to win votes off the Conservatives, deputy leader Tom Watson has said.