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!