Wind Drag Coefficients for Highway Signs and Support Structures
With increased traffic, multilane highways, and complex highway interchanges, highway signs play an
ever more important role in the safe operation of the nation’s transportation network. A detailed
understanding of stresses during the service life of sign support structures is crucial for their safe and
economic design.
The TRB National Cooperative Highway Research Program's
NCHRP Research Report 1012:
Wind Drag Coefficients for Highway Signs and Support Structures
develops comprehensive methods for estimating wind loads and
the associated drag coefficients for highway signs and overhead support structures for inclusion in the
AASHTO Load and Resistance Factor Design
Specifications for Structural Supports for Highway
Signs, Luminaires, and Traffic Signals.
This Summary Last Modified On: 2/28/2023