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!