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Table 1 Freight data used for the study
From: Characterization and analysis of metropolitan freight patterns in Medellin, Colombia
Data collection | Observations | Variables |
|---|---|---|
Cordon survey | 2950 commercial vehicles | Origin and destination of the trip |
Commodities being transported | ||
Commercial vehicle being used | ||
Establishment survey | 2947 establishments | Vehicle delivery/collection trips at establishments |
Goods flows to/from establishments | ||
Loading/unloading activity of goods vehicles | ||
Parking activity of trucks | ||
Carrier interview | 10 companies and 130 truck drivers | Trip details and patterns of goods vehicles |
Conveyance of goods between vehicles and establishments | ||
Supply chain management between establishments, their suppliers and freight transport operators |