on the track from going under the locomotive and possibly derailing the train. Coupler Coupling Device at the front and rear of the locomotive for connecting locomotives and rolling stock. See also Glossary of boiler terms Glossary of rail transport terms Horsepower#Drawbar horsepower Power classification Tractive effort References Further reading External links List of US–UK terminology – Railway Technical Website Glossaries of rail transport Steam locomotive components Steam locomotives Steam locomotive technologies Wikipedia glossaries using ordered lists