We now turn to that age-old question: Why is BART so noisy?

It turns out there are specific reasons for the noise and BART officials know what they are. BART officials also say, however, that studies actually rank BART as one of the quietest public transportation systems in the country.

Lindsay Wasserberger took her microphone into the tunnels to find out more. Hear the full story by clicking play on the audio track below.