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
The IDOT Safety Memorandum was updated 11/8/2021 and now supersedes Safety Memo 4-08 & Safety Memo 4-15:
https://public.powerdms.com/IDOT/documents/1651482/BSE-04%3A%20Work%20Zone%20Safety%20and%20Mobility
