Following the proper traffic safety procedures is key to preventing undue congestion on Holcomb Boulevard aboard Marine Corps Base Camp Lejeune. Drivers that experience a collision or breakdown should move off the road and report the incident to the base Provost Marshal’s Office. - Following the proper traffic safety procedures is key to preventing undue congestion on Holcomb Boulevard aboard Marine Corps Base Camp Lejeune. Drivers that experience a collision or breakdown should move off the road and report the incident to the base Provost Marshal’s Office.