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!