The advent of motor vehicles speeded up every phase of Park administration. However, World War I provided a respite for making adjustments. In fact, a thorough reorganization of the entire concession system was effected in 1917. The main feature involved was the consolidation of transportation under the management of the Yellowstone Park Transportation Company. The purpose of this franchise was to eliminate the pressure of rivals upon the passengers, facilitate supervision, and promote economy.[252] The Yellowstone Park Company proceeded to make a large capital investment by motorizing all transportation. Thereupon, the familiar yellow bus superseded the ancient stagecoach. It is an interesting thing to observe a caravan of twenty buses winding its way along a river drive or parked before a museum while a ranger-naturalist gives the passengers a quick orientation in the area. It would be fair to inquire if the bus driver (gear jammer) showed any improvement over the stagecoach driver in the matter of instructing the public. Not if the 1921 edition of _Truthful Lies_ correctly represents the situation, because that little booklet was a congeries of unadulterated nonsense reduced to a system.[253] However, a gradual improvement has been made, and in recent years all of the new drivers have gone around the “Loop” with a naturalist. From him they received helpful suggestions relative to natural interpretation. A few days after one of these induction tours the following conversation was reported to have taken place when passing a beaver dam: “Now, there is a beaver dam, but where are the dam beavers?” The driver straightened up and replied, “I’ll be damned if I know.” At this point it should be remembered that, although the great concourse visit Yellowstone in cars, many tourists come in buses, motorcycles, and bicycles. It should also be noted that travel by horseback has always persisted. Until the advent of the automobile this method was in general use. Indeed, firms were organized to provide grand tours of several weeks’ duration. The Howard Eaton Trail and various adjuncts are still used by horseback parties each summer. In fact, several trail-riding associations sponsor these trips under competent leadership. In this manner an excellent Park tradition is being sustained for the benefit and enjoyment of a chosen few possessed of the necessary time and hardihood.