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!