DOT/FHWA's 1988 Edition, Revision 3, Manual on Uniform Traffic Control Devices, Part VI
DOT/FHWA Part VI of the Manual on Uniform Traffic Control Devices
(MUTCD): "Standards and Guides for Traffic Controls for Street
and Highway Construction, Maintenance, Utility, and Incident Management
Operations," 1988 edition, Revision 3, September 3, 1993,
Is on the U.S. Department of Labor, Occupational Safety & Health Administration
(OSHA) website:
http://www.osha.gov/doc/highway_workzones/mutcd/index.html
This document can be downloaded from the OSHA website.