According to various aspects, exemplary embodiments are disclosed herein of audible alert systems. In exemplary embodiments, an audible alert system includes a speaker, an audio amplifier, and an audio file player. The audio amplifier and audio file player may be housed within an environmentally sealed enclosure, which provides protection from the environment. The audible alert system may be located on the front or back of a locomotive. For example, the speaker may be mounted to handrailing of the locomotive.