Box A: Proximity Criteria for an Intermodal Connection

A connection exists between modes if

• They serve the same terminal building, or
• Serve facilities that are within the same block, or
• Serve facilities in an adjacent block, but within a one block radius, as long as the traveler does not have to cross a major thoroughfare at an unprotected intersection, or cross some other physical barrier, or
• Are located in buildings that are more than one block apart but are connected by either an enclosed structure or a conveyance operated by either the facility or one of the carriers involved for the sole purpose of facilitating a connection between modes in the two buildings.

SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, March 2009.