Bleary-eyed drivers entering Washington, DC on Monday mornings, are jolted into happiness by people waving with signs with optimistic slogans from the side of the road.

29-year-old Massoud Adibpour, who started the project called "Make DC Smile", aims to get hundreds of honks from workers who might otherwise be blue because it's Monday.

Held by Massoud and 4 other volunteers, the signs were scrawled with uplifting messages: "Honk if you love someone!"; "Be happy"; "Don't be so hard on yourself"; and, "Smile!"

On the morning this photo was taken, the cheerful pedestrians were greeted by "a cacophony of honks."

(READ the story w/ photos in the Washington Post)