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!