Just seen a couple of sets of these have been installed on the A90 between Perth and Dundee. Horrible things. Don't think they're active yet as there are no signs for them. I'm heading down to Malmesbury at the weekend, leaving from Edinburgh. Does anyone know of anything like this that I should watch out for on the way. Route is A8, A700, A702, A74(M), A74, M6, M5, A417, A429.