prototypes of vehicles used on the road under the responsibility of a manufacturer to perform a specific test programme provided they have been specifically designed and constructed for that purpose.
fréamhshamhlacha feithiclí a úsáidtear ar an mbóthar faoi fhreagracht monaróra chun clár trialach áirithe a fheidhmiú ar choinníoll gur dearadh agus gur tógadh go sonrach iad chun na críche sin.