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!