Overview

Amazon is launching a new intermodal shipping program that blends rail, ocean vessels, and trucks to move inventory for third‑party sellers. The service aims to lower the per‑unit freight expense that has been climbing for road‑only transport, while also trimming carbon output. Sellers who ship large, non‑time‑critical loads stand to benefit from reduced costs and a greener supply chain.

Key Points

• Lower per‑mile cost — Shipping heavy pallets by rail or by container ship can be up to three times cheaper per mile than a full‑truck haul, especially on long hauls of 1,000 + miles.
• De‑congested routes — Moving cargo off busy interstate corridors onto rail lines and maritime lanes sidesteps typical highway bottlenecks, resulting in fewer unexpected delays.
• Carbon savings — A single ton‑mile on rail emits roughly 75 % less CO₂ than the same distance on a diesel truck, giving sellers a measurable sustainability edge.
• Risk diversification — With three transport modes in play, a disruption on one (e.g., a port strike) can be mitigated by rerouting via rail or road, keeping inventory flowing.
• Bulk‑focused advantage — The cost advantage grows with shipment size; a 40‑foot container moved by sea can carry dozens of pallets that would otherwise require multiple truck trips.
• Longer transit windows — Because rail schedules and ocean voyages are slower than direct trucking, sellers must adjust inventory forecasts to accommodate extra days in transit.

How Intermodal Shipping Works

1. Origin pickup (truck) — A carrier collects pallets from the seller’s warehouse and loads them onto a trailer designed for intermodal transfer. Example: A seller in Dallas loads a 20‑pallet palletized order onto a flatbed that will be lifted onto a railcar at the nearest intermodal terminal.
2. Rail or ocean leg — The trailer is placed on a railcar or on a container that boards a cargo ship. The mode is chosen based on distance and destination. Example: For a shipment bound for the Los Angeles fulfillment center, the cargo travels on a Union Pacific train to the Port of Long Beach, then onto a container vessel for the final ocean segment.