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NCHRP Synthesis 415: Design Fires in Road Tunnels (2011)
National Cooperative Highway Research Program Synthesis Program (NCHRPSYN)

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Maevski, Igor Y, Transportation Research Board. "Making Transportation Tunnels Safe and Secure." NCHRP Synthesis 415: Design Fires in Road Tunnels. Washington, DC: The National Academies Press, 2011.

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Front Matter (R1-R10)
Summary (1-5)
Project Overview (6-6)
Description of the Survey Process (7-8)
Prevention of Tunnel Highway Fires (9-9)
Making Transportation Tunnels Safe and Secure (10-10)
UPTUN - Summary (11-11)
SafeT (12-12)
Safe Tunnel (13-13)
EGSISTES (14-14)
Summary (15-15)
Heat Effects (16-16)
Air Carbon Monoxide Content (17-17)
Air Velocities (18-18)
Summary (19-19)
Cause of Vehicular Fires in Road Tunnels (20-22)
Consequences of Tunnel Fires (23-23)
Summary (24-25)
Combined Use for Road and Railway Vehicles (26-27)
Full Scale Tests (28-34)
Small-Scale Testing (Physical Modeling) (35-35)
Large-Scale Experimental Facilities (36-36)
Gaps in Fire Testing, Modeling Limitations, and Computational Fluid Dynamics Verifications (37-37)
Summary (38-39)
Chapter Seven - Analytical Fire Modeling - Literature Review (40-40)
Analytical (Numerical) Fire Modeling Technique (41-42)
Findings on Numerical Modeling Based on Literature Review (43-43)
Summary (44-44)
Severity of Tunnel Fires (45-45)
Existing Practice of Fire Management in Road Tunnels (46-46)
Best Design Practice (47-47)
Maintenance, Repair, and Rehabilitation of the Fire Management Systems (48-48)
Selected Important Examples (49-49)
Computer-Based Training Tools for Operators to Manage Fire - Virtual Training (50-52)
Background (53-54)
Integrated Approach to Safety in Tunnels (55-56)
Design Fire Size (57-58)
Exploring the Emerging Issues of Alternative Fuel Vehicles on Design Fires (59-63)
Fire Smoke and Smoke Production - Literature Review (64-67)
Temperature of Fire Gases and Tunnel Walls (68-69)
Fire Development Based on Literature Review (70-74)
Summary (75-77)
Chapter Ten - Compilation of Design Guidance, Standards, and Regulations (78-81)
Tunnel Ventilation and International Standards Requirements (82-88)
Tunnel Fire Detection, Notification, and International Standards Requirements (89-91)
Tunnel Egress and International Standards Requirements (92-92)
Tunnel Incident Response and International Standards Requirements (93-94)
Summary (95-95)
TimeTemperature and Time-of-Tenability Curves (96-98)
Emergency Egress Timeline (99-100)
Combined Curve for Evacuation and System Activation (101-101)
Summary (102-103)
Background (104-109)
Summary (110-110)
Influence of Ventilation on Fire Heat Release Rate (111-111)
Influence of Structural and Nonstructural Components on Fire Heat Release Rate (112-112)
Summary (113-113)
Example of Design Fire Size Estimate (114-115)
Chapter Fourteen - Conclusions (116-122)
References (123-125)
Bibliography (126-128)
Glossary (129-129)
Appendix A - Survey Questionnaire (130-135)
Appendix B - List of Responding Agencies (136-136)
Appendix C - Summary of Survey Questionnaire Responses (137-149)
Appendix D - Tunnel Safety Projects Additional Descriptions (150-155)
Appendix E - Fire Tests (156-159)
Appendix F - Comparison of National and International Standards Requirements (160-177)
Appendix G - Past Tunnel Fires Description (178-188)
Abbreviations used without definitions in TRB publications (189-189)

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11 FIGURE 1 Seven recently accomplished European projects on tunnel safety (6 ). This study demonstrates the risk of tanker truck and heavy · How can they avoid these hazards and threats? goods vehicle (HGV) accidents in road tunnels. Those vehi- · How can they prepare themselves for this disturbance if cles provide the most dangerous, largest, and most rapidly it occurs? growing category of fires. The report provides guidelines for protecting tunnels by minimizing the damage potential from extreme events such MAKING TRANSPORTATION TUNNELS SAFE that, if damaged, they may be returned to full functionality AND SECURE in a relatively short period of time. It examines safety and NCHRP Report 525: Surface Transportation Security and security guidelines in identifying principal vulnerabilities TCRP Report 86: Public Transportation Security series pub- of tunnels to various hazards and threats. It also explores lications have jointly published Making Transportation in potential physical countermeasures, potential operational Tunnels Safe and Secure (1). The report is Volume 12 in each countermeasures, and deployable, integrated systems for series. emergency-related command, control, communications, and information. This research project was developed to provide safety and security guidelines for transportation tunnel owners and The report is organized in seven chapters and covers the operators (1). To accomplish this task, a team of experienced following topics: design engineers, builders, and operations personnel collab- orated with safety and security experts to address the follow- · Hazard and threats analysis ing questions: · Case studies on fire events in road and railway tunnels in different countries · What natural hazards and international threats do they · Tunnel structural and vulnerabilities analysis face? · Countermeasures and system integration. · How would they be introduced? · What are the vulnerable areas of their tunnel? This report also focused on tunnel structural and vulnerabil- · How much of a disturbance would there be? ity analysis.