Intermodal Passenger Connectivity Database (IPCD)

About 55 percent of the approximately 14,000 passenger transportation terminals in the United States offer travelers the ability to connect among the scheduled passenger transportation modes according to the Bureau of Transportation Statistics recently completed Intermodal Passenger Connectivity Database (IPCD). Heavy Rail stations are most likely to offer connectivity, while connections are least likely to exist at airports. The IPCD is the first ever national quantification of the degree of connectivity in the passenger transportation system. It provides data on how many modes provide service at, or within a close radius of the rail, air, intercity bus and ferry terminals in the United States.