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!