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!