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!