When you centralize travel with a single agency, you gain in a number of important ways. You will have a single point of contact for problems while travelers are on the road, and you will have one entity to go to for all your travel needs. This eliminates the problem of consolidating a travel report from among several sources. By bringing travel together, you will gain significantly from economies of scale. If you can measure total travel among various divisions or locations, you can get more for your money from travel suppliers.