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!