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!