Hello! Thank you. You remember me? :) Yes the big trucks and bulldozers drive on the sand. They are putting more sand here to try and stop the Pacific Ocean from flooding the homes here. The sand disappears from the beach the surf takes it away. It's a big problem all over California and has been going on for years. Rock jetties and breakwaters disturbed the normal movement. This area is a very flat sandbar barely above sea level. Building homes on it was never a smart idea. People did it anyway.