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!