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Sign, Signal, and Luminaire Supports, Utility Poles, Trees, and Similar Roadside Features RDG Chapter 4 Roadside Appurtenances Sign and Luminaire Supports Traffic Signal Supports Mailbox Supports Utility Poles Trees crash Stub Height Criteria Stub 4” max. 5’ min. Sign Supports

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sign signal and luminaire supports utility poles trees and similar roadside features
Sign, Signal, and Luminaire Supports, Utility Poles, Trees, and Similar Roadside Features

RDG Chapter 4

roadside appurtenances
Roadside Appurtenances
  • Sign and Luminaire Supports
  • Traffic Signal Supports
  • Mailbox Supports
  • Utility Poles
  • Trees
stub height criteria
Stub Height Criteria

Stub

4” max.

5’ min.

types of sign supports
Types of Sign Supports
  • Overhead Signs
  • Large Roadside Signs
  • Small Roadside Signs
ground mounted breakaway signs

Wind

Vehicle Impact

Weak in Shear

Ground-Mounted Breakaway Signs

Strong in Moment

small sign supports
Small Sign Supports
  • Base Bending
  • Slip Base
  • Fracture
breakaway hinge point on slopes

1

4

Breakaway Hinge Point on Slopes

Safer Roads

Roadway

7’

20’

types of breakaway luminaire supports
Types of Breakaway Luminaire Supports
  • Transformer Bases
  • Slip Bases
  • Frangible Couplings
  • Fiberglass Poles