Reply To: Traffic Control Resources Home › Forums › Resident Engineer’s Toolbox › Traffic Control Resources › Reply To: Traffic Control Resources 10/30/2020 at 2:49 PM #11463 BobKeymaster Link to 2015 THE Conference presentation on Temporary Concrete Barrier and application of Work Zone Safety and Mobility: Positive Protection of Workers, Drop-offs and Temporary Concrete Barrier (Safety Engineering Policy Memorandum 4-15