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!