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!