Driving test

To take a driving test in Oklahoma, you have to arrive at the test centre at 6.30am, queue up (sorry, 'wait in line') for about 2 hours to be given a slot, then return later in the day to take your test. If you're too late to get a slot, you have to come back the next day. Why, in what is supposedly one of the most advanced countries in the world, can't you just phone (sorry, 'call') for an appointment?