Research Article

Solving the Tractor and Semi-Trailer Routing Problem Based on a Heuristic Approach

Figure 1

The basic types of vehicles. Note: In practice, many vehicle types are used in road freight transportation. This figure only lists four basic types. A large number of other types can be derived from the four basic types by the number of axles, tires and the combination style. Enterprises in most of the countries in the world employ various types.
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