Why are you concerned?
Are you worried that the authorities may see the existing damage and find that the car is not road worthy? If you live were they have regular inspections, you have reasons to worry.
- The windscreen and the seat belt and the air bags are designed to work together. If any one part is not functional it reduces the overall safety. I believe that some states require inspections that include the belt, the windscreen and the air bags.
I don’t k now how much of a reduction in safety the cracked windscreen would cause, but personally, I like living. My life and safety are important to me. If your life is not important to you, then don’t worry. The windscreen keeps you in the car. being thrown from a car is fare more dangerous that staying in.