The use of small (4 batteries & onboard charger) walk behind Class III pallet trucks in the back of trailers is significant in the United States, though I agree is not universally applied.

Yale does a significant business in these trucks and have heard it represents a majority of the Class III product they sell. I have worked over the years for both Crown and Raymond and know they sell to this market in significant quantities as well.

I would agree that it doesn't represent all of the over the road applications since America still insists on relying on trucking, in many instances, rather than Rail for much of its long haul needs. These long haul trucks are obviously not equipped with a pallet truck and are "Cubed Out" for lowest possible delivery costs.

Local deliveries and company owned trucks which are used for both local and often longer runs, are equipped with a Pallet trucks.