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!