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!