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!