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!