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!