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!