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!