I'm with you on this. The article is unclear about a few things. Just because she followed the GPS's directions doesn't mean she's an idiot. The fact that she was using GPS at all suggests that she was unfamiliar with the area; how was she supposed to know that she was going to be crossing an uncrossable railroad track? .
What uncrossable track?
It's a perfectly normal crossing. Where the tracks sink into the road... and there are arms and and lights and signs and everything. Look at the picture. A GI Joe toy could drive through it. She turned onto the tracks as if they were a road. That's why she got stuck.