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!