Abstract: A transportation data aggregator platform (“TDAP”) receives, from a carrier computing device, a selection of one or more electronic logging device (“ELD”) provider systems associated with ELDs of vehicles of a carrier. The TDAP, for each of the one or more selected ELD provider systems, (1) displays, on the computing device of the carrier computing device, a request for credentials associated with the selected ELD provider system, (2) receives, via the carrier computing device, an input comprising the credentials, (3) communicates, to the ELD provider system, the credentials, and (4) receives, from the ELD provider system, a response confirming a validity of the communicated credentials. The TDAP, in response to receiving the response for each of the one or more selected ELD provider systems, generates a letter of authorization (“LOA”) and accesses ELD data logged by ELDs of the carrier from the one or more selected ELD provider systems.