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!