Another aspect is that the drivers are actually legally hindered (in many of areas) of an ability to check the paper map as they drive, so it's either you learn

Another aspect is that the drivers are actually legally hindered (in many of areas) of an ability to check the paper map as they drive, so it's either you learn and memorize the whole way or stop the car to check; or you can have GPS to provide you with voice guidance or quick glance of which turn to take.