Chapter 5: Lighting Equipment Section 1: Overview Overview This chapter covers the specifications, materials, and construction practices related to the equipment used in highway illumination. TxDOT Standard Specifications Book TxDOT's specifies standard equipment and procedures to be used in the construction and maintenance of TxDOT highway projects. Roadway illumination projects typically use specifications from the Chapter 600 Items - Lighting, Signing, Markings and Signals. Typical specifications used in a roadway lighting project include:.

• Signalized Intersections Informational Guide

Item 416, 'Drilled Shaft Foundations'. Item 610, 'Roadway Illumination Assemblies'. Item 613, 'High Mast Illumination Poles'. Item 614, 'High Mast Illumination Assemblies'. Item 616, 'Performance Testing of Lighting Systems'. Item 618, 'Conduit'. Item 620, 'Conductors'.

Item 621, 'Tray Cable'. Item 622, 'Duct Cable'. Item 624, 'Ground Boxes'. Item 628, 'Electrical Services'. Departmental Material Specifications Departmental Material Specifications (DMS) are reference specifications for various materials published by the TxDOT Construction Division.

For roadway illumination projects, the material specifications are in the 11000 series. DMS-11010 through DMS-11012 specifies roadway luminaires. DMS-11020 through DMS-11021 specifies high mast equipment.

DMS-11030 specifies conduit. DMS-11040 specifies conductors. DMS-11050 specifies tray cable. DMS-11060 specifies duct cable. DMS-11070 specifies ground boxes. DMS-11080 through 11085 specifies electrical service equipment. These specifications are referenced by the Standard Specifications and by the electrical and lighting standard sheets, and are available on the.

Material Producer List The contains TxDOT-approved products and materials from various manufacturers and producers. The MPL for roadway illumination equipment is called Roadway Illumination and Electrical Supplies. The MPL is posted on the TxDOT website and is updated regularly.

The Traffic Engineering section of the TxDOT Traffic Operations Division (TRF) reviews electrical and lighting equipment submittals for inclusion on the MPL. Materials that meet specifications are placed on the MPL and require no further submittals when used on construction or maintenance projects.

Roadway Lighting – Resources Below are several resources and research documents that you may find useful in learning more about roadway lighting. Web-based training for FHWA Roadway Lighting Workshop This new online training is designed to educate practitioners on the latest advances in nighttime lighting concepts and technologies while refreshing their memory on basics such as the objectives and benefits of roadway lighting. Other topics include basic terminology, practices for determining whether and how lighting should be installed and controlled, measurement issues, and more. Study on Illumination for State Highways 2.9 MB This 2016 report reviewed existing public agency illumination standards domestically and internationally and outlined the difference in designing standards. An overview of existing luminaire technology performance, as well as operational and maintenance characteristics are provided.

In addition, available illumination control and spectrum technologies for performance characteristics are summarized. The results of this literature review are useful for design and business case decisions regarding illumination installation, maintenance, and operation. Publication No. WA-RD 847.1. Evaluation of The Impact of Spectral Power Distribution on Driver Performance , 9.4 MB This 2015 report provides the details and results of a comprehensive investigation of the impact of light-source spectrum on driver visual performance. Human factors experiments evaluated driver detection and recognition of large and small objects, including pedestrians, with and without overhead lighting. Publication No.

Signalized Intersections Informational Guide

FHWA- HRT-15-047. Design Criteria for Adaptive Roadway Lighting , 1.12 MB This 2014 report describes an in-depth effort to assess the impact of roadway lighting on the overall safety performance of roadways.

The results of this report were used to develop a proposed set of adaptive lighting criteria to assist jurisdictions in making sound safety-based decisions when considering adaptive lighting approaches. This robust analysis of real-world lighting data serves as the foundation for future roadway lighting analyses. Publication No. FHWA- HRT-14-051. Guidelines for The Implementation of Reduced Lighting on Roadways , 1.12 MB The guidelines presented in this 2014 report address the need to maintain the safety effects of roadway lighting while alleviating the budgetary strains associated with the maintenance of the lighting infrastructure. This report establishes a new set of criteria for practitioners to apply to their roadway environment that will identify appropriate lighting levels for given roadway characteristics and usage.

Publication No. FHWA-HRT-14-050. This Standard Practice serves as the basis for design of fixed lighting for roadways, streets, adjacent bikeways, and pedestrian ways. It deals entirely with lighting design and does not give advice on construction. Its primary purpose is to provide recommended practices for designing new continuous lighting systems for roadways and streets. This document is available for purchase from ANSI. FHWA Roadway Lighting Handbook , 5.84 MB This 2012 handbook is an update to the 1978 FHWA Lighting Handbook 78-15 as well as the 1983 addendum.

It is meant to provide guidance to designers and State, city, and town officials concerning the application of roadway lighting. Publication No. FHWA-SA-11-22. This document is being updated. The October 2005 document is available for purchase from AASHTO.