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!