The types of vehicles allowed to use a T3 lane without restriction include:
- Vehicles carrying three or more people (including the driver).
- Public transport buses and minibuses.
- Taxis and hire cars with hire car number plates.
- Motorcycles and bicycles.
- Emergency vehicles such as ambulances, police cars, and fire engines.
- Special-purpose and breakdown vehicles.
- Electric vehicles are also permitted to drive in transit lanes regardless of occupants until a specified date in some regions (e.g., until June 2027 in NSW).
Other vehicles with fewer passengers may only enter a T3 lane for up to 100 meters under certain conditions, such as to enter or leave a road, overtake a vehicle turning right, or avoid an obstruction. Thus, the vehicles allowed to use a T3 lane without restriction are mainly those with three or more occupants and the specific classes of vehicles listed above.
