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!