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!