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!