Police block off all other roads and the Motorcycles can only ride in a 23 mile loop.
See Loop Map & explanation here: http://www.wbtw.com/news/grand-strand/what-you-need-to-know-about-the-myrtle-beach-traffic-loop/1196474270
When will the traffic loop be in effect?
Friday, May 25 – Sunday, May 27 from 10 p.m. – 2 a.m.