For those with long driveways you may decide to make it more difficult for some to simply cruise down the road. Small barrier made from nothing more than dirt can slow a vehicle down.
This small barrier only needs to be a few feet high, and positioned in a serpentine manner. This allows access to the driveway, but slow controlled access.
This barriers can be built a variety of different ways, from dirt hills, to an arrangement of 20 gallon planting pots full of dirt. Of course if you have an abundance of materials you could materials from wood, or even concrete. Barriers can help control roads as well as driveways for a united community. They simply need to be arranged in a staggered formation to make people turn left or right to steer in between them. This slows vehicles down significantly, and makes it nearly impossible for a mobile attack.