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!