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!