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!