U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Bridges & Structures

<< PreviousContentsNext >>

Highway and Rail Transit Tunnel Inspection Manual

2005 Edition

Glossary

  • AASHTO American Association of State Highway and Transportation Officials
  • AC Alternating Current
  • ATSSA American Traffic Safety Services Association
  • CCTV Closed Circuit Television
  • Chord A line segment that joins two points on a curve
  • CO Carbon Monoxide
  • CWR Continuous Welded Rail
  • DC Direct Current
  • ETS Emergency Trip Switch
  • FHWA Federal Highway Administration
  • FRA Federal Railroad Administration
  • FTA Federal Transit Administration
  • Gunite Term commonly used for fine-aggregate shotcrete
  • gpm Gallons per minute
  • IES LM-50 Illuminating Engineering Society, Lighting Measurements - 50
  • IES RP-22 Illuminating Engineering Society, Recommended Practices - 22
  • ITE Institute of Transportation Engineers
  • Km/h Kilometers per hour
  • mph Miles per hour
  • MTS Maintenance Testing Specifications
  • MUTCD Manual on Uniform Traffic Control Devices
  • NATM New Austrian Tunneling Method (synonymous with SEM)
  • NBIS National Bridge Inspection Standards
  • NBS National Bureau of Standards
  • NEMA National Electric Manufacturers Association
  • NETA InterNational Electrical Testing Association
  • NFPA National Fire Protection Association
  • OSHA Occupational Safety and Health Administration
  • PEI Porcelain Enamel Institute
  • SEM Sequential Excavation Method (synonymous with NATM)
  • TBM Tunnel Boring Machine
  • TSS Track Safety Standards
  • UPS Uninterruptible Power Supply
<< PreviousContentsNext >>
Updated: 06/19/2013
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000