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!