There are two forms of vehicle classification

Vehicle size class

Vehicle size classes are a way of classifying cars. The common North American parlance is word-based, while English-speaking European writers also use words to describe car sizes...

 in Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

. Vehicles are classified by categories in the driving license and by categories for toll highways.

Driving license classification

Category	Description
A	Motorcycles with displacement Motorcycle engine A motorcycle engine is an engine that powers a motorcycle.Motorcycle engines may be two-stroke or four-stroke, reciprocating or Wankel, single-cylinder or multicylinder , or single-rotor or twin-rotor . The engine typically drives the rear wheel, but some small bikes such as the Velosolex have a...  of 126 cm³ or more
A1	Motorcycles with displacement of 51 cm³ to 125 cm³
B	Car Čar Čar is a village in the municipality of Bujanovac, Serbia. According to the 2002 census, the town has a population of 296 people.-References:... s and van Van A van is a kind of vehicle used for transporting goods or groups of people.In British English usage, it can be either specially designed or based on a saloon or sedan car, the latter type often including derivatives with open backs... s lighter than 3500 kg and with 9 or less seats
C	Truck Truck A truck or lorry is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration, with the smallest being mechanically similar to an automobile... s and other vehicles heavier than 7000 kg with 9 or less seats (riding on flatbed is forbidden in Croatia)
C1	Truck Truck A truck or lorry is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration, with the smallest being mechanically similar to an automobile... s and other vehicles between 3500 kg and 7000 kg in weight with 9 or less seats
D	Bus Bus A bus is a road vehicle designed to carry passengers. Buses can have a capacity as high as 300 passengers. The most common type of bus is the single-decker bus, with larger loads carried by double-decker buses and articulated buses, and smaller loads carried by midibuses and minibuses; coaches are... es, minibus Minibus A minibus or minicoach is a passenger carrying motor vehicle that is designed to carry more people than a multi-purpose vehicle or minivan, but fewer people than a full-size bus. In the United Kingdom, the word "minibus" is used to describe any full-sized passenger carrying van. Minibuses have a... es and other vehicles with 10 or more seats
F, G	Various two-wheel tractor Two-wheel tractor Two-wheel tractor or walking tractor are generic terms understood in the USA and in parts of Europe to represent a single-axle tractor, which is a tractor with one axle, self-powered and self-propelled, which can pull and power various farm implements such as a trailer, cultivator or harrow, a... s and similar vehicles
H	Streetcars
M	Motorcycles with displacement of 50 cm³ or less

Toll categories

There are four toll categories for road vehicles using toll bridge

Toll bridge

A toll bridge is a bridge over which traffic may pass upon payment of a toll, or fee.- History :The practice of collecting tolls on bridges probably harks back to the days of ferry crossings where people paid a fee to be ferried across stretches of water. As boats became impractical to carry large...

s and toll highways in Croatia. These categories are accepted by all highway contractors

Concession (contract)

A concession is a business operated under a contract or license associated with a degree of exclusivity in business within a certain geographical area. For example, sports arenas or public parks may have concession stands. Many department stores contain numerous concessions operated by other...

and issued by HUKA, the Croatian association of toll highway contractors.

Category	Includes
IA	Motorcycles
I	Two-axle vehicles with front axle height of 1.3 m (4.3 ft) or less, excluding all vans
II	Three or more axle vehicles with front axle height of 1.3 m (4.3 ft) or less, including vans
III	Two or three-axle vehicles with front axle height of 1.3 m (4.3 ft) or more, including all vans with trailers
IV	Four or more axle vehicles with front axle height of 1.3 m (4.3 ft) or more