Carts have the distinct advantage of mobility, should a location not be productive in sales, as well as for transporting goods to/from storage to the marketplace.
Firstly, highly mobile customers required food and drink to keep them warm within the early open carriages.
This expansion lead to a mutually successful relationship with some of the first concession stands and laws developing from mobile traders operating from restricted railway property.
This form of concession based operation can be seen still in many countries, but at its most original in the under developed stations and infrastructure of Africa and Southeast Asia.
In the 21st century, innovations have included modular designed carts made with stainless steel, fiber reinforced plastic and aluminum.