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!