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!