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!