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!