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!