An automated tunnel-type scanning system arranged about a conveyor belt structure, including: a tunnel structure arranged about a conveyor belt structure for transporting packages; an omni-directional bar code symbol scanning subsystem; a package detection and dimensioning subsystem; and a data management subsystem. The package detection and dimensioning subsystem captures package measurement information about each detected package prior to the package being scanned by the omni-directional bar code symbol reading subsystem, and producing package measurement data representative of the captured package measurement information. The data management subsystem collects and queues package identification data and package measurement data, and automatically correlates both package measurement data and package identification data corresponding to each package transported through the tunnel structure so as to enable automated tracking and identification of packages being transported therethrough, in either singulated or non-singulated arrangements.