Oxfordshire County Council has said that its 'traffic filter' trial will begin on Monday, September 28, replacing the temporary congestion charge. It will operate in a similar way to the congestion charge, with the filters being at the same six locations and a permit scheme in place. Congestion charge sign (Image: Isabella Harris/NQ)At each traffic filter site, automatic number plate recognition (ANPR) cameras will monitor and enforce the restrictions. During the first six months of the traffic filter trial, the council will send a warning notice the first time any car goes through a traffic filter without using a permit, instead of sending a penalty charge notice. The locations and operating times of the traffic filters will be the same as the temporary congestion charge.