A novel privacy control-adjustable commercial vehicle ELD and trip data-sharing system and a related method of operation provide a dynamically-adjustable access grant or denial of privacy-sensitive and competitive intelligence-sensitive commercial fleet vehicle operations information to a third-party corporate partner entity of a transportation company, based on a trip data-share authorizer's response to an electronic request made by the third-party corporate partner entity. In one embodiment, vehicle information is categorized into a mandatory disclosure dataset and a privacy-adjustable dataset, wherein the mandatory disclosure dataset is disclosed to a vehicle monitoring personnel or an authorized third-party corporate partner entity at all times within a prespecified time limit, while the privacy-adjustable dataset is only selectively accessible when the trip data share authorizer explicitly grants access via an electronic user interface connected to the privacy control-adjustable commercial vehicle ELD and trip data-sharing system, upon entry of a correct or authenticated partner key.