A system for use on a vehicle comprising a tractor and a trailer comprises a communications device that effects communications between the system and a remote system. The communications device is configured to receive data from the remote system. An event detector is configured to generate a trigger signal in response to detecting occurrence of predetermined events. An onboard computer is coupled to the communications device, the event detector, a media recorder, and a computer of the vehicle. One or more image capture devices at the vehicle are communicatively coupled to one or both of the onboard computer and the media recorder. The onboard computer is configured to adjust one or more parameters of the image capture devices and/or modify one or more parameters of the event detector based at least in part on the data received from the remote system.