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!