The explanation is that Crângaşi was initially designed to also house the "Y point" for the M1 and M4 lines (a point where two lines, that for a number of stations have used the same trackage and stopped in the same stations, diverge on separate routes), in a manner similar to the way Eroilor functioned until 1999 - Line 1 and 2 used for trains entering the common section from different routes while line 3 for trains exiting the different routes).
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