Devious motorists are thought to be using forged permits to make their way through checkpoints on the closed stretch of the A4.
Security is also being tightened because some drivers travelling between Bath and Bristol through Saltford have been pretending to visit local businesses in order to trick their way through the village's controlled access points.
Yesterday, some motorists and businesses were told by checkpoint staff that as of today, they would have to travel all the way around to Keynsham and come in from that end.
Drivers without permits visiting businesses, friends or relatives will still be able to enter from both the Bath and the Saltford ends, but will be expected to leave the same way they came in unless they have very convincing reasons not to.
They will face stiff questioning by staff at the central checkpoint if they try to pass through.
Maybe they are trying to catch the escaped Worstall...