R9 Route Code
To specify the route using a single code.
Mutually defined route code.
R901 will contain a mutually defined code, agreed to by shipper and carrier.
Code identifying source of routing specification.
Code identifying the Intermodal Service Plan.
R903 is required when N711 contains codes CC, CN or TL.
Standard Carrier Alpha Code
R904 is used to identify the SCAC of the delivery switch carrier.