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!