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