VIT 200 stands for Very Important Trucker and for the fact that only 200 of these Bi-Centennial Kenworth tractor-trailers were produced.  Obviously, not every trucker got one.

The three bicentennial products offered by Trainworx are being sold as a complete set only, given the small quantity produced, 200 in the entire continent, and the very limited quantity allowed to each distributor and retailer.