Coordination is hard. The overwhelming majority of traffic on the Mississippi is not soybeans. The soybean industry is not terribly concentrated. Why should the

Coordination is hard. The overwhelming majority of traffic on the Mississippi is not soybeans. The soybean industry is not terribly concentrated. Why should they pay all the costs only to receive a small portion of the benefits? This kind of problem with large positive or negative externalities and myriad actors is usually the province of governments to solve. For another example see climate change.