&&.&&&&.&&                                          .&....&&&&
.&&...&&..                                          &&...&....
&.&..&.&.&                                          .&..&&....
&&&.&&&&&&                                          &&.&.&...&
..&&.....&                                          .&&&&&..&.
.&.&....&.                   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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&..&&..&.&                                          &&&..&.&&.
&.&.&.&&&&                                          ..&.&&&.&&
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.....&..&&                                          &..&.&.&.&