City light rail, commuter trains and even industrial railways have seen a revitalization over the past 5 or 10 years. But new tracks are presenting what is perhaps an unplanned for, yet highly common, problem: runoff. The Oceanside to Escondido 22-mile track near San Diego is a prime example. The new route has cost millions in erosion control measures and been fined heftily. It’s a sector in greater need of attention.

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