Section 3: Plan Standards

Introduction

This section explains some of the standard practices used in TxDOT highway illumination plan layouts.

Scale of Plans

Generally, a scale of 1:100 provides plenty of detail for lighting layouts. Underpass lighting sometimes requires 1:50. Other special lighting systems, such as tunnel lighting, may require more detailed layouts.

Boring Logs

High mast lighting layouts should include soil boring logs. See the (Bridge Collection) for details.

Standard Plan Symbols

TxDOT has developed standard illumination symbols to aid in plan preparation. Figure 6-1 explains these symbols.
Standard symbols for light poles used byTxDOT in plan preparation. Note that breakaway transformer basepoles are represented by a square, and non-breakaway (or shoe base) polesare represented by a small circle. (click in image to see full-size image)
Figure 6-1. Standard symbols for light poles used by TxDOT in plan preparation. Note that breakaway transformer base poles are represented by a square, and non-breakaway (or shoe base) poles are represented by a small circle.