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!