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!