On 7/13/2016----- my passenger and i were traveling on clemson road where the posted speed limit is 45 mph, its a four lane highway with no median. a truck did a u turn in front of a lot of traffic my vehicle struck his at about 40-43 mph though me and my passenger had seat belts on my passenger still managed to hit his head on the windshield through the airbag. my passenger was 5'2 135 pounds so the seat belt did fit properly and was also being worn properly, with the lap band snug against hip one and shoulder strap fully across chest and latch buckled. my passenger was took to the hospital and was examined for injuries that may have occurred from the head trauma of hitting the wind shield.. why didn't the passenger seat belt keep my passenger from hitting the windshield??? i believe that the seat belt didn't lock in place like it should have once the breaks were pressed- my passenger kept traveling forward as the vehicle slowed down. note that my passenger was holding his head once we exited the vehicle!