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!