Five Massport workers pleaded not guilty today to charges that they took bribes from cab drivers at Logan International Airport in exchange for letting drivers bypass the waiting pool to pick up fares.

The defendants, Kenneth Clement, 67, of Attleboro; ¬Michael Garvey, 51, of Melrose; Vadim Mkrtychev, 37, of West Roxbury; James Mulrey, 45, of Stoughton; and Donald Potts, 47, of Medford were arraigned in East Boston District Court. All were released on personal recognizance, despite prosecutor Nicholas Walsh’s request that they be held on $1,000 cash bail.