You appear to have fixed two of them which seem fine now. The car park seems to have three roads, one with a pay on exit. I don't think the in and out have to join although the out should be extended to reach the car park. Some car parks will have a route out, such as a foot path or cycle track from it which need connecting to the roads in so routers work. This one goes through the pay office so I wouldn't want to be routed through it. One other thing to do in cases of doubt it is contact the previous mapper. mapper who may have been "on the ground".