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!