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!