N.Y.C. Admin. Code § 19-156: § 19-156 Work zone safety on bridges.

a. For purposes of this section, the following terms shall have the following meanings:

1. "Bridge" shall mean a span that includes a roadway for use by motor vehicles, that is located above another surface.

2. "Work zone" shall mean a location where workers are engaged in a stationary operation that exceeds four hours in duration and which is not predominantly separated from traffic by a temporary concrete or other rigid barrier system.

b. On or before January 1, 2015, the commissioner shall conduct a review of guidelines and best practices with regard to work zone safety on bridges that are under the jurisdiction of the department. A written report detailing such guidelines and best practices shall be submitted to the speaker of the council and posted on the department's website upon completion.