Sustainable circulating railway line and network
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[0065]Detailed description will be given below in conjunction with drawings and embodiments accompanying.
[0066]Metro or RER lines can hardly pass through a square city in the X-ways; while FIG. 1-T2 / T6 / T10 / T14 shows a four-terminal line connected by a hollow-X-shaped turnout 4Yv, taking advantage of four sides' streets to avoid central district. In this way, all trains online circulate among T2-T14-T10-T6-T2 and four double-track sections through the central 4Yv turnout.
[0067]As shown by FIG. 2 / 4-8 / 11-12 / 14-15, and always from central point of view, a circular-turnout comprises at least three multi-connected Back-and-Forth (BF) ports, and at least one set of at least three-way V-turn ramps or tracks, facilitating vehicles turning from the Back-track of each BF port into the Forth-track of the same (right or left) side nearby BF port, completing an at least three-way circulation, such as B1-F3 / B3-F2 / B2-F1 in FIG. 5.
[0068]In FIG. 12 and magnified as FIG. 13-FB3, the 4YX turnout compri...
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