Current conditions were:
There were few individuals between the corner and the driveway of #1 St Lawrence, but they increased in number in a southwestward direction in the mowed vegetation along the shoulder and especially concentrated on dead vegetation (dead grass clippings and other dead vegetation on the sandy shoulder beside the pavement), where I counted up to 8 clustered in close proximity to one another. I saw no mating behaviour - just resting and crawling, and grazing. One snail was munching away on the fine leaves of dead yellow grass clippings, with its eye-stalks pulled in, as if it was chewing contentedly with its "eyes closed". They reached their greatest concentration, which was about averaging 10 individuals easily visible per linear metre along the road-shoulder vegetation just across from 6 St Lawrence, and diminished gradually to none past the culvert across from the yard of the Pentecostal Church. I have more photos, as well as a history of the introduction, available on request.