For me personally this traffic management system is a disaster as I am fortunate that I have parked in the Science Park for the last 3 years. So not being able to get out of the Science Park and turn right at a roundabout at either end makes me have to go back to the stadium and not only turn around to join a long line of traffic but wait for it all to come out of the car parks before I can join it as some bloke holds a stop sign for 15 minutes, so probably adding 20-30 minutes to my get home time. So I may as well be back in the stadium car park now.
It so happened I was picked up at the stadium on Saturday so didn't have my car, but the person picking me up said no way not again as they were stopped getting to the stadium to get to the pick up point due to the stop go in operation favouring the car park so much.
I don't mind traffic management initiatives within the car park and stadium complex but I see no valid reason why they should affect traffic direction on a public highway (and it seems blocking a public footpath that is well used by fans after a match too). It is worth noting that the science park is a 24/7 operation and science doesn't stop for the weekend for everyone so this football traffic calming measure will affect local business detrimentally too if they can't get in and out of their workplace when they have to.
We've all put up with car park problems for almost 20 years and it hasn't been a reason for anyone to stop going. Doesn't need changing in my view and it is an accepted problem of going to watch Oxford United. I've had far worse traffic experiences at other grounds, in fact we should be grateful that there even is a car park. And MK next week is a £7 rip off to park and the traffic getting out will be worse.