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!