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!