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!