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!