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!