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!