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!