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.&.&..&.&.                                          &.&&.&.&.&
.&.&.&&.&.                  R41LS                   &..&.&.&.&
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.&.&..&.&. &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &.&&.&.&.&
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.&.&..&.&. &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &.&&.&.&.&
.&.&.&&.&.                                          &..&.&.&.&
.&.&..&.&.                                          &.&&.&.&.&
.&.&.&&.&. 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. &..&.&.&.&
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.&.&.&&.&.                 &&&&&&&&                 &..&.&.&.&
.&.&..&.&.                                          &.&&.&.&.&
.&.&.&&.&. 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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