User:Repiv

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         2      3
     A    __--__    B
 1    __--      --__    4
  __--              --__
--__                  __--
    --__          __--
 8      --__  __--      5
     D      --      C
         7      6

ballast - sleepers - rails

412-423: straight (3*4)
8-3; 2-5; 4-7; 6-1

424-435: s-bend (3*4)
7-3; 1-5; 8-4; 2-6

436-459: switch (3*8)
D-3; A-5; B-7; C-1; D-4; A-6; B-8; C-2

460-471: outer corner (3*4)
8-5; 2-7; 4-1; 6-3

472-483: inner corner (3*4)
8-5; 2-7; 4-1; 6-3

484-495: u-turn (3*4)
3-4; 5-6; 7-8; 1-2