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!