I dont see why it wouldnt be 1:1 considering that most routes all take around half an hour or so to cover an overall pretty short distance
Indeed it's all a 1:1 scale with the real world (though admittedly some of the buildings feel like they have some odd proportions, but that's a small niggle). You can double check this by cross referencing real world timetables and comparing it to the ones in game, which for the most part should roughly line up. If it takes one hour to drive a route in the real world, it'll take an hour in game as well!