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Washington State Freight Economic Corridors

Freight Economic Corridors are roadways, railways, and waterways important for the movement of commerce in Washington State. They are based on the Freight and Goods Transportation System classifications and, in the case of roadways, the corridor designations recognize the importance of system resiliency (alternate routes to primary cross-state freight routes during severe weather or other disruptions) and supply chains (first/last mile connections to freight intensive land uses).

WSDOT worked with the Freight Mobility Strategic Investment Board, Metropolitan Planning Organizations, Regional Transportation Planning Organizations, counties, cities, tribal governments, and ports to develop objective criteria in defining the statewide system of Freight Economic Corridors.

Freight Economic Corridors are used to identify and map supply chains, identify system condition and capacity issues, and to develop performance measures to improve freight mobility.

Additionally, a list of freight priority improvement projects on the Freight Economic Corridors was developed and included in the 2014 Freight Mobility Plan capital project list; WSDOT received and included over 250 of these regional strategies from partners.

Freight demand and supply chains are dynamic and routing and traffic volumes change over time. Therefore WSDOT will update the Freight Economic on a two-year cycle, coordinated with the update to the Freight and Goods Transportation System.

Rail Freight Economic Corridor Classification Structure:
The following FGTS classifications for railways are Rail Freight Economic Corridors:
R1: more than 5 million tons per year
R2: 1 million to 5 million tons per year
R3: 500,000 to 1 million tons per year
R4: 100,000 to 500,000 tons per year 
Statewide Map of Rail Freight Economic Corridors (pdf 1.3 mb)

Waterway Freight Economic Corridor Classification Structure:
The following FGTS classifications for waterways are Waterway Freight Economic Corridors:
W1: more than 25 million tons per year
W2: 10 million to 25 million tons per year
W3: 5 million to 10 million tons per year
W4: 2.5 million to 5 million tons per year
W5: 0.9 million to 2.5 million tons per year 

Statewide Map of Waterway Freight Economic Corridors (pdf 0.9 mb)

Truck Freight Economic Corridor Classification Structure: 
The following criteria is used to define Truck Freight Economic Corridors:
1. T1 freight corridors that carry more than 10 million tons per year

2. T2 freight corridors that carry 4 to 10 million tons per year

3. Alternative freight routes that serve as alternatives to T1 truck routes that experience severe-weather closures, and carry 300,000 to four million tons per year

4. First/last mile connector routes between freight-intensive land uses and T1 and T2 freight corridors. These criteria were used to identify the connector routes:
   • To-and-from T1 and T2 truck routes and strategic U.S. defense facilities
   • Over-dimensional truck freight routes that connect the state’s significant intermodal facilities to the T1 and T2 highway system 
In urban areas: 
• To-and-from the Interstate system and the (1) closest major airport with air freight service, (2) marine terminals, ports, barge loaders and other intermodal facilities, and (3) warehouse/industrial lands 
• From high-volume urban freight intermodal facilities to other urban intermodal facilities, e.g. from the Port of Seattle to the BNSF rail yard in Seattle 
In rural areas: 
• To-and-from state freight hubs located within five miles of T1 and T2 highways; freight hubs are defined as: (1) agricultural processing centers, (2) distribution centers, (3) intermodal facilities, and (4) industrial/commercial zoned land 
• Routes that carry one million tons during three months of the year (reflecting seasonality) of agricultural, timber or other resource industry sector goods

Additional information for Truck Freight Economic Corridors:
Data Sources and Interim Rules for Applying Connectivity Criteria (pdf 16 kb)
Statewide Truck Freight Economic Corridors GIS file (zip 2.3 mb) 

Truck Freight Economic Corridor Maps by MPO/RTPO: