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!