Potomac River Bridge Towing Compact; adds several bridges to Compact.

Adds the Harry W. Nice Bridge, Sandy Hook Bridge, Brunswick Bridge, and Point of Rocks Bridge to the Potomac River bridges subject to the Potomac River Bridge Towing Compact to facilitate the prompt and orderly removal of disabled and abandoned vehicles from the bridges by giving the District of Columbia, Maryland, and Virginia appropriate authority anywhere on the bridges. This amendment to the Compact shall not become effective until a substantially similar amendment is enacted by the State of Maryland and the District of Columbia, as provided for in the Compact.