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!