SomeoneElse
It's a very long time (decades!) since I've been in the area so I won't be able to help directly, but now we know a bit more about what the problem is people in the area may be able to investigate.
What vehicle was your driver driving?
The road on aerial imagery looks like a very narrow service road / alleyway - it would not surprise me if a large vehicle could not physically fit down there.
Best Regards,
Andy
