One of the topics we get the most questions about from our audience is transportation. Today we round up answers to a handful of your questions, including: Where does all that toll money from Bay Area bridges go? Why has one toll booth on the San Francisco-Oakland Bay Bridge been closed for years? Why are do so many of our interstates end in "80"? And: Are there more vanity plates in the Bay Area? Plus a few more! We're joined by KQED's Dan Brekke, who has been covering transportation in the San Francisco Bay Area for more than 20 years.

Additional reading:

• You're Really, Really Curious About BART
• Why Doesn't BART Go More Places?
• When BART Was Built, People — and Houses — Had to Go
• The Tale of the Bay Bridge Troll
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• Enter our Sierra Nevada Brewing Company monthly trivia contest
• Episode Transcript

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This story was reported by Dan Brekke. Bay Curious is made by Olivia Allen-Price, Katrina Schwartz and Christopher Beale. Additional support from Jen Chien, Katie Sprenger, Maha Sanad, Alana Walker, Holly Kernan and the whole KQED family.