rails                  
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have to follow a set path.  this path is 
 called  a  "railway", which is comprised 
 of two metal rails, hence  its nickname. 
                                          
 because  the  low  friction  between the 
 wheels of the train and the  rail metal, 
 there  are limits for how acute  a curve 
 can  be, and  even more so for how  much 
 the  ground  under  the   rails  can  be 
 sloped. thus a railway is  often not led 
 on top of hills, rather  through them in 
 tunnels  (if   they   are   large),   or 
            artificial chasms.            
                                          
 there will be  trees  on the side of the 
 rails, but not too close,  or they  will 
 be cut  down  by  the railway  janitors. 
 there  will be  plains,  and  bodies  of 
                  water.                  
                                          
 trains  go by  day  and by night.  along 
       the way, there is information      
 scattered, often  put on top  of  poles, 
 to be  interpreted by the train drivers. 
 different  parts  of  the  railway  have 
         different speed limits.          
                                          
 sometimes, trains have to stop and  wait 
 for something to  happen, far away. this 
 is  signaled  by red  or  green  lights. 
                                          
                                  
                                          
 many people  follow  the rails  by foot. 
 often  this  proves  to be  the  shorter 
 path  between  two  points. however this 
 is  frowned  upon,   and  very  impolite 
        toward the train drivers!