I saw your initial post over two weeks back and was really challenged by those photos. The next time I looked there were two posts. As soon as I looked at it, the second one immediately said “Keelback” to me. Under magnification I could see there were keels on scales. Also the pattern of dark banding was far more typical of Keelbacks rather than the possible but unlikely alternative of a Rough-scaled snake. I am not familiar with the area where you are, but If I am correct about the snake’s identity, then you would likely be in a relatively low altitude, fairly flat area, rather than an upland or hilly region. My apologies that I waited and did not post post this sooner.