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!