2000 Dodge Neon tires problems

While driving at 65 MPH on the freeway my left rear tire blew out spinning me out of control. I hit a road side sign (one leg of the sign 12" x 24" post) on the left front quarter panel, continuing down over a small incline and coming to rest a few yards away. My seat belt failed to retract, air bags failed to deploy and the seat failed to keep me in an upright position. All this failures resulting in my being throwing around inside the car.

2000 dodge neon-I have had this car for 5 years and use it solely for commuting to and from work. I am a careful driver and do not abuse this vehicle. During these 5 yrs I have had the following work on this car; replaced the brakes twice within the first 2 yrs replaced the battery 3 times over 5 years replaced the transmission at 70k replaced the radiator at 70k the car performs very poorly in ice and snow. I have spun out on several major highways merely doing less than 10 MPH in snow/slush.