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!