Once WAZE sets the initial route, let me press a button to lock the directions so they don't change while I'm en route. Often if I'm driving on a freeway (in LA) I will get random instructions to "make a U-turn (on the 405?)" or to turn on some surface street. I assume its because the app is re-calculating as I go or doesn't recognize that I did take the correct off-ramp, but these unnecessary commands are distracting and its hard to tell which are valid and which are not. Obviously if I DO make a mistake in following the directions, WAZE should alert me and let me press a button to re-calculate from where I am currently.