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!