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!