For Australia, at least, the rail lines are shown in red and major roads are shown in maroon. The lines for the roads are mostly thinner than for the rail, but not consistently so. At first glance, it's difficult to determine which lines are road and rail, unless you already know which is which.

Australian roads are also out of whack.

Then again, they could as well draw "here be dragons", it's not that anyone would ever actually do anything using these maps.