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!