The Director shall place and maintain official traffic control devices when and as required under this Subtitle to make effective the provisions hereof and may place and maintain such additional traffic-control devices on the streets and highways and public parking facilities under the jurisdiction of this County as may be deemed necessary to regulate traffic pursuant to County or State law or to guide or warn traffic. The Director shall coordinate and approve the installation and maintenance of traffic control signal monitoring systems as permitted under this Subtitle as may be deemed necessary to regulate and enhance enforcement of traffic laws pertaining to traffic control signals.