If you know your wipers do not work there is a spray product (I think called Rainex) that when used the water rolls right off the glass so car's occupants can see as well as if you were using wipers or maybe even better. That, of course, has to be re -applied periodically but it does work well. I don't know an answer if the wipers stop working in the middle of a rainy trip. Maybe looking out the sides of the car to the front may be easier to see than trying to look through a window full of water? I guess stop asap and get wipers fixed is best answer! STAY SAFE!