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!