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!