If a driver (new or experienced) can't tell the difference between a road and a railway then they shouldn't be driving. Poor signage don't even come into it.
I think the offence here would be driving without due care or attention.
Luckily it wasn't causing death by dangerous driving.
Do you drive? If so, can you put your hand on your heart and honestly say that you've never ever made a mistake in your entire driving career?
I had very little experience "under instruction". This was because:
a) Driving lessons are expensive and I couldn't afford to take any more once my instructor had deemed that I was ready to take my test.
b) The only other driver in the household (my dad) hadn't held a full licence for long enough for him to be able to legally accompany me outwith driving lessons.
My driving instructor, after I'd been handed my pass certificate, said "now you'll learn how to drive". 30-odd years on, I'm still learning. I like to think that I'm a reasonably competent driver, but every now and then a situation arises that makes me question my decisions.
There's a lot of information to take in when learning to drive. There is the physical operation of the vehicle for a start. Then you have to get used to the rules of the road, while learning how to adapt to changing conditions as you go along.
Let's not be so quick to judge.