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!