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!