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!