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!