.&.&.&.&&.                                          &&..&&.&&&
&&&&&&&.&.                                          .&.&.&&..&
......&&&.                                          &&&&&.&.&.
.....&..&&                                          ....&&&&&.
....&&.&..                                          ...&....&.
...&.&&&.&                  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!         &.&...&.&&
.&.&&&&.&&                                          &&&..&&&..
&&&...&&.&                                          ..&.&..&..
..&..&.&&.                                          .&&&&.&&.&
.&&.&&&.&.                                          &...&&.&&&
&.&&..&&&.                                          &..&.&&..&
&&.&.&..&&                                          &.&&&.&.&.