Vehicle audible signal processing methods, systems, and apparatuses are disclosed. An example method comprises detecting a plurality of audible signals in a geographic area, determining locations of the plurality audible signal, determining a location of the apparatus, determining, based on the determined locations of the plurality of audible signals and based on the determined location of the apparatus, waveform characteristics for the plurality of audible signals, comparing the determined waveform characteristics for the plurality of audible signals to one or more signal signatures, determining, over a threshold period of time, a quantity of the plurality of audible signals that comprise waveform characteristics matching signatures of the one or more signal signatures, and determining, based on the quantity, a traffic density for the geographic area.