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The improvements identified for the Houston Region Freight Rail Study are
classified into the following categories:
Level 1 Improvement − Identified near-term railroad improvements
Level 2 Improvement − Identified mid-range railroad improvements
Level 3 Improvement − All grade crossing closures and separations
Level 4 Improvement − Identified long-range improvements such as double
tracking of or adding infrastructure capacity to existing segments
Level 5 Improvement − Identified long-range improvements such as
consolidations, alternative routes or corridors, and major yard operation
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