**Parameters**


*τkij* : Time required to travel the arc/edge (*i*, *j*) ∈ E with a vehicle of type *k* ∈ K, calculated as follows: *τkij*= *max*{ *dkij vv<sup>k</sup>* , *dkij avkij*}

*tgm* : Aspiration level of goal *m* ∈ M.
