This undated brochure was likely produced in the middle 1960s as it mentions the Chesapeake Bay Bridge-Tunnel, which was completed in 1964. It was created by the Ocean Hiway Association.
The “Ocean Hiway” detailed in the brochure primarily uses US routes 13 and 17. The Hiway ends in Jacksonville, which shows that it was produced to encourage travelers heading to Florida to stop at the many attractions along the way.
By the way, US-17 continues in Florida, heading into the interior of the peninsula. It passes through Orlando and Kissimmee, is the main north-south road in Polk County and ends near the Gulf coast in Punta Gorda.