Let us start from the source. Let us also work the source for forklift tipovers.

Speed, turning a corner too sharply, too abruptly is the biggest cause of forklift tipovers, especially when the truck is empty. If people would slow down when turning, we can eliminate many tipovers.

It always amazes me on how many people out there believe, either because they have been taught, or merely assumed, that a forklift is more stable empty, hence they can drive faster without a load.

So, if we work on the root of the problem, then maybe we can lessen the amount of tipovers.

That being said, Ed is correct. Seatbelts merely restrain the operator from jumping in a tipover situation, and not there to protect an operator from a head-on collision.