For the application of the definition, the distance between the last axle of a front group of axle and the first axle of a rear group of axle shall be considered.
Chun an sainmhíniú a chur i bhfeidhm, measfar gurb é an fad idir an t-acastóir deireanach de ghrúpa d'acastóirí tosaigh agus an chéad acastóir de ghrúpa d'acastóirí cúil, measfar gurb é sin an fad.