Many smart cities use technology to improve their public transport systems to reduce emissions, pollution, and congestion, improve public spaces and boost convenience for citizens. But what does the smart-city movement mean for security in public transport? In this e-book, we answer this question and many more by taking a helicopter view of smart cities and analyzing their impact on public transportation. We deep dive into macro trends and key security challenges affecting European bus, metro and rail companies and suggest solutions for how to mitigate them using intelligent video technology.