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!