Travelling Salesman problem in the city 1.1.0.0

Let`s imagine for an example such situation. You are engaged in delivery of small goods in the city.You need to optimize a route of the courier (traveling salesman or vehicle) to go round some customers in different places of city and to return to a point of departure.There can be such situation.You need to go round, we shall admit, 16 customers. One vehicle can to not have time to make it. It is necessary to use more vehicles.