Why Are There Rainbows on the Tunnel Between S.F. and Marin? (Plus Bonus Anniversary Questions)

<p>It started as a quest to make Bay Area highways more beautiful. Plus, three other bonus questions!</p><p><br></p><p>Reported by Jessica Placzek and Olivia Allen-Price. Bay Curious is Olivia Allen-Price, Jessica Placzek, Suzie Racho, Penny Nelson, Paul Lancour and Julia McEvoy. Theme music by Pat Mesiti-Miller.</p><p>Ask us a question at BayCurious.org. Follow Olivia Allen-Price on Twitter @oallenprice.</p>