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!