Less than you'd think; it was a non-standard gauge railroad that didn't go anywhere the Sa'udis cared about -- they needed railways connecting their ports to th

Less than you'd think; it was a non-standard gauge railroad that didn't go anywhere the Sa'udis cared about -- they needed railways connecting their ports to the interior, so spending the money on a Madinah to Jordan line didn't make sense. KSA has invested a massive amount of money on rail lines, but the north-south track is a recent development. Plus, Land Rovers don't care if you have to go over a few kilometers of damaged road, and fuel is unsurprisingly cheap. And if you don't want to drive, there's a lot of airports.