Heads up for any people considering traveling through Belgium via Lille in to France. We were stuck in a 65 minute traffic jam on 16 March as the main motorway was diverted in to a single lane via a car parking area where vehicles were arbitrarily pulled over for a spot check and search. Some great entertainment with trucks blocking lanes and irate motorists! The diversions looked reasonably permanent. Open borders pah! (I do get why thought!)