Well, now that the winter has hit my hometown, the noises under my car become a lot scarier as I plow over ice blocks, slush puddles and hidden potholes.
Oh how I wish I were in warmer climes, most notably Japan, where the Hokkaido Industrial Research Institute has created the "Melody Road," pictured below.
Like those gravelly rumble-strips carved into highway shoulders to warn you when you're veering off-road, the grooves in the Melody Road are spaced such that a car's tires passing over them at 28 MPH or so will produce high and low notes...and the ensuing Surprise of a low-tech musical interlude.
While I don't see this replacing radios, CDs or MP3 players, the highway strips open up a whole new world of advertising as corporations can carve their jingles into the blacktop, leading to everything from Name That Tune contests to sonic accompaniment to roadside billboards (or a musical lead-in to multi-vehicle pile-ups as drivers' attentions are diverted).
No matter how primitive the fidelity, the melodies of this road will still sound better than a broken axle or blown tire.