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!