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!