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Sign, Signal, and Luminaire Supports, Utility Poles, Trees, and Similar Roadside Features RDG Chapter 4.

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Presentation on theme: "Sign, Signal, and Luminaire Supports, Utility Poles, Trees, and Similar Roadside Features RDG Chapter 4."— Presentation transcript:

1 Sign, Signal, and Luminaire Supports, Utility Poles, Trees, and Similar Roadside Features RDG Chapter 4

2 Roadside Appurtenances Sign and Luminaire Supports Traffic Signal Supports Mailbox Supports Utility Poles Trees

3 crash

4 Stub Height Criteria 4 max. 5 min. Stub

5 Sign Supports

6 Types of Sign Supports Overhead Signs Large Roadside Signs Small Roadside Signs

7 Portland/Oregon street sign

8 Tysons/Lessburg street sign

9 Ground-Mounted Breakaway Signs Wind Strong in Moment Vehicle Impact Weak in Shear

10 Car position 1

11 Car position 2

12 Car position 3

13 7 Car diagram

14 Uni-directional slip base

15 Frangible coupling

16 Old Mill Bottom Road Sign

17 Lower signs

18 Small Sign Supports Base Bending Slip Base Fracture

19 Breakaway Hinge Point on Slopes Roadway 20 7 Safer Roads 1 4

20 2 concerns

21 Luminaire Supports

22 Types of Breakaway Luminaire Supports Transformer Bases Slip Bases Frangible Couplings Fiberglass Poles

23 4 Stub Requirement


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