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!