1. A system comprising: a wireless communication network which communicatively couples a first vehicle and a second vehicle that is traveling in a same direction as the first vehicle and located in a different lane relative to the first vehicle, wherein the first vehicle includes a set of first electronic sensor devices, a second electronic sensor device and a first onboard vehicle computer; wherein the set of first electronic sensor devices are one or more MicroElectroMechancial (MEMS) sensors configured to record first barometric pressure data describing a first barometric pressure associated with the first vehicle; wherein the second electronic sensor device is configured to record acceleration data describing an acceleration of the first vehicle; wherein the first onboard vehicle computer is communicatively coupled to the wireless communication network, the set of first electronic sensor devices and the second electronic sensor device, and the first onboard vehicle computer is programmed to (1) adjust the first barometric pressure data based on the acceleration of the first vehicle so that the first barometric pressure data describes an acceleration-adjusted reading of the first barometric pressure associated with the first vehicle and (2) automatically transmit the first barometric pressure data describing the acceleration-adjusted reading to a selected channel of the wireless communication network; wherein the second vehicle includes a second onboard vehicle computer that is communicatively coupled to the selected channel of the wireless communication network and programmed to receive the first barometric pressure data describing the acceleration-adjusted reading and determine an estimate of altitude separation based on the first barometric pressure data and second barometric pressure data describing a second barometric pressure associated with the second vehicle; wherein the estimate of altitude separation describes an estimate of whether the first vehicle and the second vehicle are located at substantially the same altitude; and wherein the second onboard vehicle computer is programmed to suppress a collision threat alarm based on the estimate of altitude separation indicating that the first vehicle and the second vehicle are not located at substantially the same altitude.