Under Article 12 of Chilean Traffic Law (Ley 18.290), which vehicles and equipment are legally authorized to be operated with a Special Class D driver's license (Licencia Especial Clase D)?

1. Heavy articulated cargo trucks on interurban highways
2. Automotive machinery such as agricultural tractors, combine harvesters, excavators, backhoes (retroexcavadoras), forklifts (grúas horquilla), motor graders, and road rollers
3. Motorcycles and scooters exceeding 250cc
4. Taxis and passenger buses