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!