Google this address and then find the river about 1/2 mile to the west, The road in question was Shallowford Road and the cyclists were headed east from the river towards the vinyard.
5394 Williams Road
Lewisville, NC 27023-8278

I know I should not respond to the Cop Bully, but in 27 years I issued more verbal warnings than citations, 90% of my citations came when someone felt they knew the law better than I did, I would always give the chance for arguement in court.