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!