MVB3X Modular Vehicle Barrier System to ensure compatibility and seamless integration with the portable barrier system currently in use. The primary purpose of the barriers is to block roadways for se... MVB3X Modular Vehicle Barrier System to ensure compatibility and seamless integration with the portable barrier system currently in use. The primary purpose of the barriers is to block roadways for security and traffic control. The requirement is for two specific configurations. See specitication sheet for details