In case you were wondering, cop and firefighter unions are still pissed at the mayor.

Late this week, a new billboard sponsored by Baltimore City's police and firefighter labor unions will go up in an effort to draw attention to their grievances with Mayor Stephanie Rawlings-Blake and the City Council. The move follows the PR success of the billboard the groups sponsored last year (pictured). The new billboard is time to go up just as the United States Conference of Mayors begins its annual meeting in Baltimore this Friday, ostensibly in an effort to maximally embarrass the mayor.

“Based on the overwhelming response we received from our prior billboard, we feel the best way to get our message across will be to display it for all the visiting mayors to see, clear as day, in black and white,” Rick Hoffman, president of the International Association of Firefighters Local 734, said in a statement issued today.

The groups had considered a protest march during the conference to voice their discontent over cuts to pension benefits and wage reductions, but opted to go with just the billboard.

“We want the citizens of Baltimore to know that we stand by our oath to work for the betterment of Baltimore, despite that City Hall has not stood by us,” says Robert F. Cherry, President of the Fraternal Order of Police Lodge 3.