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!