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!