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!