Lighting Mountains: The State of Oregon Makes its Tunnel System a Lot Brighter

This article examines how Oregon’s Department of Transportation has handled upgrading lighting conditions in a number of its mountain tunnels. Nearly a dozen tunnels were constructed in the state between 1930 and 1970, and although lighting upgrades were done in the 1960s, many of the wiring systems were failing and replacement parts were becoming harder to come by and more expensive. This article describes the various tunnels—some on the coast where salt-laden fog causes corrosion, some in urban areas with high volumes of traffic, and some with historic detail and style that needed to be accommodated. The article discusses the effects of interior finishes on light, the black-hole effect for vehicles entering the tunnel, and determination of threshold zone light level. It discusses the lighting choices the tunnel renovation officials opted for and their reasons.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/11660022
• Authors:
  • Degnan, Jim
• Publication Date: 2005-10

Language

• English

Media Info

• Media Type: Print
• Features: Photos;
• Pagination: pp 42-46
• Serial:
  • Roads & Bridges
  • Volume: 43
  • Issue Number: 10
  • Publisher: Scranton Gillette Communications
  • ISSN: 8750-9229
  • Serial URL: http://www.roadsbridges.com/rb/

Subject/Index Terms

• TRT Terms: Lighting systems; Tunnels
• Geographic Terms: Oregon
• Subject Areas: Bridges and other structures; Design; Highways; I25: Design of Tunnels;

Filing Info

• Accession Number: 01019500
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS, ATRI
• Created Date: Mar 1 2006 9:07AM