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!