The container ship "unluckily" maneuvered between the protective barriers. About 4 more protective barriers would have stopped this collapse.
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No bridge survives being struck by a container ship. That's why barriers are erected around critical points. There already were barriers, they just weren't complete coverage for some reason. (EDIT: Maybe the older 1970s era design of this particular bridge wouldn't allow more protection to be placed. Obviously this situation calls for a full investigation / lessons learned kind of thing, as part of the new bridge building process)
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No bridge survives being struck by a container ship. That's why barriers are erected around critical points. There already were barriers, they just weren't complete coverage for some reason. (EDIT: Maybe the older 1970s era design of this particular bridge wouldn't allow more protection to be placed. Obviously this situation calls for a full investigation / lessons learned kind of thing, as part of the new bridge building process)