The lap part of the belt should be worn low and snug on
the hips, just touching the thighs.
In
a crash, this applies
force to the strong pelvic bones.
And
you’d be less llkely
to slide under the lap belt. If you slid under it, the belt
would apply force at your abdomen.
This
could cause
serious or even fatal injuries. The shoulder belt should
go
over the shoulder and across the chest. These parts
of
the
body are best able to take belt restraining forces.
The safety belt locks if there’s a sudden stop or crash.