A road junction described as "one of the most dangerous crossroads" in the Midlands will be closed to make way for surveys to take place. National Highways is set to carry out the work on the A483 between Llynclys and Llanymynech from Monday. The road will be shut, along with the B4396 eastbound and the A495 westbound at the Llynclys junction, on weeknights from 21:00 BST to 06:00 until 12 June.