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!