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