T-1B - Freight

T-1B1 - Road

T-1B1a - Light-duty Trucks

T-1B1b - Heavy-duty Trucks

T-1B1c - Other Road Freight

T-1B2 - Rail

T-1B3 - Aviation

T-1B4 - Shipping

T-1B4a - International Shipping

T-1B4b - Navigation