How can I define fixed cost for the real location problem in urban transportation area?

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Krzysztof Lewandowski

Look a cost of time of delivery, compare time, long of trip, cost for each, and a maximal flow of load on each road

Dimitris Kavroudakis

Based on the actual type of your analysis, you can include different type of cost evaluation function. You can use cost of space, cost of time, cost of flow or even cost of transportation legs. The type of your cost, will be related to your analysis. In other words: "What is the purpose of your analysis?"