An interactive freight map works best when it answers the first location question: which corridor, gateway or air-cargo node is involved?
Fixed layers such as interstates, ports and cargo airports give structure. Time-sensitive layers, such as weather alerts, add current context when they are available.
Start with a labeled corridor, gateway or cargo airport, then open its detail page and source link for additional context.
Avoid false precision when reading a map layer. A corridor and nearby signal can explain where to look next, but they do not show that a specific load is being tracked.