Mr Brown also announced an internet radio service which will provide travel information for the Games in July and the Queen’s Baton Relay, which reaches Scotland on 14 June.
The signs have been erected at four major Border crossings - the A1, A68, A7 and A74(M)
Mr Brown, speaking at Carter Bar on the A68 in the Borders, said: “Hosting prestigious events such as the Commonwealth Games and Ryder Cup places Scotland on a truly international stage. It is only fitting that visitors get a warm welcome from the moment they arrive, and these signs will help ensure that, while reflecting our pride in staging these events.”
The others signs are at Lamberton on the A1, Scotsdike on the A7 and Gretna on the A74(M).
Mr Brown said the radio service “means visitors, commuters and residents can get even more real time information on the move. This will not only prove useful for those attending events but also for people going about their daily business.”
It will be available at www.trafficscotland.org and via the Tune-In radio app.
VisitScotland chairman Mike Cantlay said: “Scotland is renowned for its great hospitality and thanks to these new signs visitors will get a glimpse of this as soon as they cross the border.
“It is also an important reminder that Scotland is definitely the place to be this year with the Commonwealth Games, Ryder Cup and the Year of Homecoming - three momentous events which will showcase Scotland as a proud, passionate and welcoming nation with a world-class tourism offering.”