From: Assessment of freight traffic flows and harmful emissions in euro-mediterranean context: scenario analyses based on a gravity model
Service type
Parameters
β1
β2
β3
Liquid bulk
0.418
0.369
− 1.746
Dry bulk
0.287
0.294
− 0.757
Container
0.320
0.189
− 0.299
Ro-Ro
0.280
0.359
− 1.288
General Cargo
0.157
0.101
− 0.522