How Does Rain Create More Potholes?

<p>This year's rainy winter has left San Francisco Bay Area roads riddled with potholes. Why? And will Caltrans fix them?</p><p><br></p><p>Reported by Penny Nelson. Bay Curious is Olivia Allen-Price, Vinnee Tong, Paul Lancour, Suzie Racho, Jessica Placzek and Julia McEvoy. Our Vice President for News is Holly Kernan. Theme music by Pat Mesiti-Miller.</p><p><br></p><p>Ask us a question at BayCurious.org.</p><p><br></p><p>Follow Olivia Allen-Price on Twitter @oallenprice.</p>