Paul Watter, from the AA, told ITV News that bottlenecks on motorways can be incredibly dangerous, because they spill back on to the carriageway. He said that it was understandable for work to be carried out to reduce congestion, but it would come with difficulty for the local area.
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Aaron French-Willcox was just 19 years old when he was found dead while living in a tent in a park in February.
Police are searching for a man who fled on foot after his car collided with four vehicles - leaving a child with minor injuries.
Joshua Pillinger died in the collision at the Mid Wales Activity Centre on Sunday.