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!