Two explanatory paragraphs from the EIS document. I don't know much else about the project's background.
Alternatives 1A, 1B, and 1C would not fully address the 3rd Street pedestrian safety issues because rail traffic would remain on the 3rd Street corridor. Closing 3rd Street would eliminate the problem of the street immediately adjacent and parallel to the tracks. The issue of the busy corridor through a dense residential area with numerous pedestrian attractions would remain however. Alternatives 2A and 2B would remove rail traffic from the 3rd Street corridor, eliminating the issue.
[...]
Springfield has a long‐held goal to eliminate rail traffic in the 3rd Street corridor (UP) and to consolidate rail traffic in the 10th Street corridor (NS) (see Springfield Railroad Consolidation Study, 2005; and The 10th Street Solution, 2011). The 3rd Street and 19th Street (CN) corridors are the most residential of the three corridors in Springfield; the 10th Street corridor is the least residential. The 3rd Street corridor passes through downtown, the State Capital Complex and the Mid‐Illinois Medical District. The rail corridor inhibits planned development in the Medical District because of the reluctance to construct medical, academic or research structures too close to the tracks (Springfield Area Transportation Study, 2010). Development in downtown, especially residential development is restricted by the 3rd Street rail corridor. Much of the 10th Street corridor passes through the east edge of downtown and a warehouse and industrial area. Springfield’s comprehensive plan calls for relocation of the 3rd Street corridor to 10th Street and construction of an intermodal station on 10th Street. Alternatives 2A and 2B achieve this goal and are consistent with Springfield’s plan since they eliminate rail traffic on 3rd Street and consolidate on 10th Street.






