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!