&&.&.&..&.                                          &.&..&&&..
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
.&.&.&.&&.                  R41LS                   &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&. &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &.&.&..&.&
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&. &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &.&.&..&.&
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
.&.&.&.&&. TR41NS  4R3  SO  CONSTRUCT3D  TH4T  TH3Y &.&.&.&&.&
.&.&.&..&. H4V3 TO FOLLOW  4 S3T P4TH. TH1S P4TH 1S &.&.&..&.&
.&.&.&.&&. C4LL3D 4  "R41LWAY", WH1CH  1S COMPR1S3D &.&.&.&&.&
.&.&.&..&. OF  TWO M3T4L R41LS, H3NCE 1TS N1CKN4M3. &.&.&..&.&
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&. B3C4USE TH3  LOW  FR1CTION  B3TWEEN  TH3 &.&.&..&.&
.&.&.&.&&. WH3ELS OF TH3 TR41N 4ND TH3 R41L  M3T4L, &.&.&.&&.&
.&.&.&..&. TH3RE 4R3 L1MITS  FOR HOW  4CUT3 4 CURV3 &.&.&..&.&
.&.&.&.&&. C4N B3,  4ND 3VEN  MOR3 SO FOR  HOW MUCH &.&.&.&&.&
.&.&.&..&. TH3  GROUND   UND3R  TH3  R41LS  C4N  B3 &.&.&..&.&
.&.&.&.&&. SLOP3D. THUS 4  R41LWAY 1S OFT3N NOT L3D &.&.&.&&.&
.&.&.&..&. ON  TOP OF H1LLS, R4TH3R THROUGH TH3M 1N &.&.&..&.&
.&.&.&.&&. TUNN3LS   (1F   TH3Y   4R3   L4RG3),  OR &.&.&.&&.&
.&.&.&..&.            4RT1FICIAL CH4SMS.            &.&.&..&.&
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&. TH3RE W1LL B3 TR3ES ON TH3 S1D3  OF  TH3 &.&.&..&.&
.&.&.&.&&. R41LS, BUT NOT  TOO CLOS3, OR  TH3Y W1LL &.&.&.&&.&
.&.&.&..&. B3 CUT  DOWN BY  TH3  R41LWAY  J4N1TORS. &.&.&..&.&
.&.&.&.&&. TH3RE  W1LL  B3  PL41NS, 4ND  BOD13S  OF &.&.&.&&.&
.&.&.&..&.                  W4T3R.                  &.&.&..&.&
.&.&.&.&&.                                          &.&.&.&&.&
.&.&.&..&. TR41NS  GO  BY D4Y 4ND  BY  N1GHT. 4LONG &.&.&..&.&
.&.&.&.&&.      TH3 W4Y, TH3RE 1S 1NFORM4TION       &.&.&.&&.&
.&.&.&..&. SC4TT3RED, OFT3N  PUT ON  TOP  OF POL3S, &.&.&..&.&
.&.&.&.&&. TO B3 1NT3RPRETED  BY TH3 TR41N DR1V3RS. &.&.&.&&.&
.&.&.&..&. D1FF3RENT  P4RTS  OF  TH3  R41LWAY  H4V3 &.&.&..&.&
.&.&.&.&&.          D1FF3RENT SP3ED L1MITS.         &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
.&.&.&.&&. SOM3T1MES, TR41NS H4V3 TO STOP  4ND W41T &.&.&.&&.&
.&.&.&..&. FOR SOM3TH1NG TO H4PP3N, F4R  4WAY. TH1S &.&.&..&.&
.&.&.&.&&. 1S S1GN4L3D  BY  R3D  OR  GR3EN  L1GHTS. &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
.&.&.&.&&.                 &&&&&&&&                 &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
.&.&.&.&&. M4NY P3OPLE  FOLLOW  TH3 R41LS  BY FOOT. &.&.&.&&.&
.&.&.&..&. OFT3N  TH1S  PROV3S  TO B3  TH3  SHORT3R &.&.&..&.&
.&.&.&.&&. P4TH  B3TWEEN  TWO  PO1NTS. HOW3VER TH1S &.&.&.&&.&
.&.&.&..&. 1S  FROWN3D  UPON,  4ND  V3RY   1MPOLIT3 &.&.&..&.&
.&.&.&.&&.         TOW4RD TH3 TR41N DR1V3RS!        &.&.&.&&.&
.&.&.&..&.                                          &.&.&..&.&
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.&.&.&.&&.                                          &.&.&.&&.&