Transport

1. Boats/Ships

1.1. Rivers/canals/sea

1.1.1. Port

1.1.1.1. Cargo

2. Trucks

2.1. Cargo

2.1.1. Deliveries

2.1.1.1. Cargo

3. Rail

3.1. Trains

3.1.1. Freight

4. Distance

4.1. km/miles

4.1.1. Speed

5. Trade

5.1. Buyer

5.1.1. Consumer

6. Cars

6.1. Roads

6.1.1. Travel

7. Fuel

7.1. Type

7.1.1. Cost