There are four VRT categories used in Ireland, which correspond to European classification equivalents.
The categories are:
A (EU: M1): passenger vehicles, including saloons, hatchbacks, Jeeps, coupés, MPVs, minibuses, and convertibles.
B (EU: N1): light commercial vehicles designed to carry no more than 3.5 tonnes, including car derived vans, Jeep derived vans, and crew cabs.
C (EU: N2): larger commercial vehicles, agricultural vehicles, or buses with up to 10 seats designed to carry no more than 12 tonnes, including trucks, large vans
D (EU: N/A): emergency vehicles such as ambulances, road construction transport equipment, and fire engines.