Today, there tend to be various forms of professional couriers, that should be distinguished from diplomatic couriers. Frequently the mode of transport chosen by the courier company is usually determined by the size of the consignment and physical location of the collection and delivery points. If the collection or delivery place is actually in a crowded and crowded city centre then on-foot couriers, bicycles and motorcycles can be used. If, however, the collecting point is inside a quiet suburban area or perhaps inside a country destination, motor cars, trucks as well as trucks can be utilized. Long distances are usually covered by air and terrain, using road or railway networks. In many instances where the distance is actually less than 1 thousand kilometres a system is utilized. Here, a pickup is actually driven from the two principal zones to meet at a protected 1 / 2 point, like a bus facility. On arrival at the crucial point, the trucks with their cargo of products, letters and goods are swopped as well as driven back through the night so that the articles on board are ready for delivery to their last desired destination overnight. Courier businesses have found that this sort of over night plan to be more economical and dependable than air transport. Some courier companies only transport mail and smaller packages locally, so they would depend chiefly on on-foot couriers, bikes and motorcycles automobiles, whereas for larger consignments they might use vans and small lorries. These commercial couriers emerged as clients found postal service was relatively slow and unreliable. In particular cases in which a report must be transported very quickly and safely an onboard courier is utilized. This courier is actually given the package or bundle, which is usually transported in the cabin of the plane. As soon as the on-board courier arrives at the milestone desired destination he/she would exit the air port and get a taxi immediately to the delivery destination. Of course, on board couriers are very costly simply because the courier business has to pay someone to manage the carriage and the cost of an airline ticket. Like the leading courier companies such as DHL, FedEx, TNT, Aerospeed Couriers has on occasion delivered urgent documents by an on-board courier.