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!