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!