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!