Lots of unnecessary complexity. In this case it makes sense because the majority of the line is directly over a river due to space constraints, but it's a lot s

Lots of unnecessary complexity. In this case it makes sense because the majority of the line is directly over a river due to space constraints, but it's a lot simpler to build a concrete viaduct and run normal trains ovwr it. This also allows the train to transition to run underground or at-grade.