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!