Across the country right now, cities and transit agencies are taking steps to address violence on their systems — particularly against the people who work to keep our buses and trains running, clean, and safe for everyone to ride. But what are the root causes of that violence — and are strategies like deploying armed police actually addressing them?  On today's episode of The Brake, we speak to Urban Institute Senior Research Associate Lindiwe Rennert about her research into how violence against transit workers correlates with larger problems like police brutality and income inequality – and what that means for transit advocates who want to keep people safe on board.  Listen in, and check out our earlier coverage of Rennert's work here.