Streetsblog editor Aaron Naparstek and StreetFilms’ Nick Whitaker hit the intersection of Atlantic, Flatbush and Fourth Avenues Thursday morning to see what a "Gridlock Alert Day" looks like at one of New York City’s most congested intersections.

After about 25 interviews with drivers it became pretty clear that if City Hall truly wants to reduce traffic congestion during the holiday season, it needs to do a whole lot more than just say, "Hey, everybody it’s a Gridlock Alert!" 

What might the City do instead of issuing futile alerts? Here’s one idea from London that seems to be working pretty well.