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!