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!