This is low given the cost of handling equipment. Modern installations typically require 100 000 TEU to operate efficiently. Moreover, the successive marshalling of wagons to build a full train is a source of costs and delays. Such an organisation implies a focus on the core railway network, while local, low-profit lines are closed. On the one hand, this improves the profitability of railways and allows them to offer competitive services. On the other hand, this limits the railways' geographic coverage, which might be harmful for local economic systems.