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!