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!