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!