11 Facts About Seat belt

In case of vehicle rollover in a US passenger car or SUV, from 1994 to 2004, wearing seat belt reduced the risk of fatalities or incapacitating injuries and increased the probability of no injury:.

However, the first modern three-point seat belt used in most consumer vehicles today was patented in 1955 by the Americans Roger W Griswold and Hugh DeHaven.

Evidence of the potential of lap belts to cause separation of the lumbar vertebrae and the sometimes-associated paralysis, or "seat belt syndrome" led to the progressive revision of passenger safety regulations in nearly all developed countries to require three-point belts, first in all outboard seating positions, and eventually in all seating positions in passenger vehicles.

Belt-in-Seat is a three-point harness with the shoulder belt attached to the seat itself, rather than to the vehicle structure.

In NASCAR, the 6-point harness became popular after the death of Dale Earnhardt, who was wearing a five-point harness when he suffered his fatal crash; as it was first thought that his Seat belt had broken, and broke his neck at impact, some teams ordered a six-point harness in response.

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The Seat belt can be pulled from the reel only slowly and gradually, as when the occupant extends the Seat belt to fasten it.

Pretensioners preemptively tighten the Seat belt to prevent the occupant from jerking forward in a crash.

Vehicle owners tend to disconnect the motorized or door-affixed shoulder Seat belt to relieve the nuisance when entering and exiting the vehicle, leaving only a lap Seat belt for crash protection.

Also, many automatic seat belt systems are incompatible with child safety seats, or only compatible with special modifications.

Since November 2014, seat belt reminders are mandatory for the driver's seat on new cars sold in Europe.

Effects of seat belt laws are disputed by those who observe that their passage did not reduce road fatalities.