From everything i have read it sounds like the pine snake is easily confused with a grey rat snake (Elaphe obsoleta spiloides). Both tend to coil up and mock rattle and hiss when threatened, which is exactly what this snake did. It was halfway in the road and i was attempting to persuade it back on to the shoulder. I was able to take several shots without the snake moving until i nudged it with a stick and like lightning it coiled up and started hissing.
alabama outdoors says the following .... "Pine Snakes are easily distinguished from the latter (grey rat snake) by the enlarged rostral scute and the undivided anal scale" well i certainly did not attempt to check for the anal scale and have no idea what the rostral scute is. (northern pine snake)
http://www.outdooralabama...t/reptiles/snakes/nps.cfmsam.... i would be very interested in hearing back if you find anything out. According to Outdoor Alabama the species is of "high conservation concern", it would be neat if it turned out to be one.
here is another picture of the unknown snake

Identify this snake (Peavine Falls area)
below is a picture of a grey rat snake per the following link, very similar markings (grey rat snake)
http://www.outdooralabama...tiles/snakes/ratsnake.cfm
Identify this snake (Peavine Falls area)