Answer:
Improve
I've heard that a band crashed on the bridge, coming back from all-state. They were all excited to express the news to their school mates when the vehicle crashed, killing all. It's said that you hear the tuba and band music continuously playing, because they didn't make it home to show their relatives and friends of the good news of WINNING all-state. Question is... it's thought that they was also playing their instruments when they wrecked.
Whether this is true or not, i do not know. But as you do drive over the bridge it does sound as if a band is playing, more so, a tuba. Listen closely.... Do you believe it to be true?