NFPA 502 2026 edition standard for road tunnels

NFPA 502: Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2026 edition

$157.00

Tackle today’s structural protection and emergency readiness challenges to reduce hazards and help safeguard lives.

Keep pace with updated fire and life safety requirements: NFPA 502, Standard for Road Tunnels, Bridges, and Other Limited Access Highways—the international standard for limited access highways, road tunnels, bridges, elevated highways, depressed highways, and roadways that are located beneath air-right structures.

With comprehensive provisions for ventilation, means of egress, electrical systems, standpipe and water supply, and traffic control and communications, NFPA 502 is essential for designers, engineers, architects, authorities having jurisdictions, and state and federal regulators.

The 2026 edition features several important updates, including:

  • Updated critical velocity equations
  • Annex G updated to clarify the risks associated with alternative fuels
  • Revised tenability limits for skin exposure correlated with flux radiation
  • Added requirement to consult local responding emergency response agencies early in the design process
  • New requirement that allows for the omission of supervision of manual dry standpipe systems when the systems are accessible for regular inspections as prescribed by NFPA 14, Standard for the Installation of Standpipe and Hose Systems
  • Clarified requirements in Table A.7.2 for minimum road tunnel fire protection
NFPA502-2026
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SpecificationsNFPA, 2025
8" x 11" softcover
78 pages
ISBN: 9781455932092

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