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!