PW-44 Narrow Bridge Signs, also known as a PW44, WW2, or a W13-2 sign, are used to warn of a narrow bridge ahead. The sign consists of a narrow bridge symbol, displayed on a standard permanent warning PW diamond sign. PW-44 Narrow Bridge Signs can be used inconjunction with a both a RG-20 Single Lane - Priority and a RG-19 Single Lane Give Way Sign.