Here is a bit of useless information using the specification, from IvanB, of 1.21 metres per second while reading an audio CD. If the track on a full 74 minute CD was strung out along the highway it would cover 60 x 74 x 1.21 / 1000 = 5.372 km. (3.338 miles)

Hey, you may need this fact in a game of Trivial Pursuit.