CEMENT barriers have been placed on trails at Letitia Spit in Fingal Head in the latest effort to stop vehicles accessing the beach.
The Tweed/Byron Local Aboriginal Land Council, who managed the spit, placed the barriers at the trail heads.
The concrete barriers were ranged between 6m-10m and were similar to those used on roadwork sites.
The land council had tried other techniques to keep vehicles off the beach.
In March last year, illegal 4WD activity at the spit had caused the land council to place a sign stating, "Private property, trespassers will be prosecuted," in order to stop the destructive 4WD behaviour.
The land council later dug holes at the trail heads to stop vehicles from accessing the beach during busy holiday periods.
In October last year it also employed a security guard to patrol the dunes.
The land council was unavailable for comment on the concrete barriers.