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!