A method of transmitting data from a vehicle corresponding with an associated trailer via a smartphone operated by a driver of said vehicle, the method comprising steps of:
- inputting into said smartphone load parameters including a geographic loading point, a geographic unloading point, and a load identification parameter;
- using said smartphone to collect an image of said trailer storage area after said storage area cleanliness has been verified by said driver;
- using said smartphone to collect an image of an exterior of said trailer and a lock associated with said trailer which functions to secure said load contained within said storage area;
- and
- said smartphone communicating to a host transportation database said load parameters indicative of the geographic position and condition of said load over a range of geographic positions and time intervals commencing from its loading event through until its unloading event.