They were supposed to stop already... Almost 2 years ago the National police chief ended checkpoints. But it must have hurt a lot of police income. So in Feb they allowed it again with stricter rules supposedly. I guess getting caught on cam and publicized was not one of their guidelines for the checkpoints they set up now....
Everytime I take the tollway, I get stopped by the police when i am paying the toll. I have seen them run from the office on the left to my car just to try to catch me driving without a Thai permit. Luckily, I have one.