Reading the article it sounds like a bit of both.
The traffic lights will be turned off and the police will manually control the traffic at the junction.
Anyone found to be abusing stewards and or trying to jump the queue will lose their parking privileges.
Please let this be the end of this sorry saga.
I think there does need to be some measures taken to stop impatient aggressive drivers bullying their way to the car park exit. I also think some minor improvement/tweaks can be made to the flow of cars leaving. Otherwise I think users of the car park just have to chill out and accept it will take time. Why is everyone in such a rush to get home? All you have to do is clear an extra hour or so in your Saturday tea time diary. There is no need to run, you can walk.