National Academies Press: OpenBook

Human Factors Guidelines for Road Systems: Second Edition (2012)

Chapter: Chapter 26 - Abbreviations

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Page 299
Suggested Citation:"Chapter 26 - Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2012. Human Factors Guidelines for Road Systems: Second Edition. Washington, DC: The National Academies Press. doi: 10.17226/22706.
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Page 299
Page 300
Suggested Citation:"Chapter 26 - Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2012. Human Factors Guidelines for Road Systems: Second Edition. Washington, DC: The National Academies Press. doi: 10.17226/22706.
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Page 300
Page 301
Suggested Citation:"Chapter 26 - Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2012. Human Factors Guidelines for Road Systems: Second Edition. Washington, DC: The National Academies Press. doi: 10.17226/22706.
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Page 301

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

t Sampling Interval AADT Average Annual Daily Traffic AASHTO American Association of State Highway and Transportation Officials ABS Anti-Lock Braking System ADA Americans with Disabilities Act ADT Average Daily Traffic APL Arrow-per-Lane (Sign) APS Accessible Pedestrian Signals ATIS Advanced Traveler Information Systems ASD Available Sight Distance BRT Base Reading Time CALTRANS California Department of Transportation cd Candela CIE Commission Internationale de l’Eclairage cm Centimeter(s) CMS Changeable Message Signs CVO Commercial Vehicle Operations dBA Sound intensity measured in decibels (relative to sound pressure level of 20 micropascals). The frequency spectrum is weighted to approximate human hearing. DMS Dynamic Message Sign DSD Decision Sight Distance DVRE Driver, Vehicle, Roadway, and Environment EL Edge Line FARS Fatal Accident Reporting System FHWA Federal Highway Administration ft Foot/Feet g Acceleration/deceleration equivalent to the rate of acceleration due to gravity. One g equals approximately 9.8 m/s2. HAR Highway Advisory Radio HAWK High-Intensity Activated Cross-Walk HCM Highway Capacity Manual HFG Human Factors Guidelines for Road Systems HPS High Pressure Sodium (Lamp) HSM Highway Safety Manual IA Intersection Angle 26-1 C H A P T E R 26 Abbreviations* *Covers all chapters.

IHSDM Interactive Highway Safety Design Model ISD Intersection Sight Distance ITE Institute of Transportation Engineers km/h Kilometers per Hour LC Lane Change LD Legibility Distance LED Light-Emitting Diode LPS Low Pressure Sodium (Lamp) m Meter mcd Millicandela MH Metal Halide mi Mile mi/h Miles per Hour mm Millimeter MMI Most Meaningful Information MT Maneuver Time MUTCD Manual on Uniform Traffic Control Devices NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration N•m Newton Meter NMSL National Maximum Speed Limit NTOR No Turn on Red PCC Portland Cement Concrete PIEV Perception-Identification-Emotion-Volition PMD Post-Mounted Delineator POV Principal Other Vehicle PRT Perception-Reaction Time PSD Passing Sight Distance PVSD Preview Sight Distance R value Correlation-coefficient ROW Right-of-Way RRPM Raised Reflective Pavement Marker RT Reaction Time RTOR Right Turn on Red s or sec Second(s) SAE Society of Automotive Engineers SCL Speed-Change Lane SD Sight Distance SF Safety Factor SI International System of Units SLIDE Simplified Location of Information Deficiencies SPD Spectral Power Distribution SR Sampling Rate SRS Shoulder Rumble Strip SSD Stopping Sight Distance SV Subject Vehicle SVROR Single Vehicle Run off Road TCD Traffic Control Device TER Truck Escape Ramp USSC United States Sign Council UVC Uniform Vehicle Code HFG ABBREVIATIONS Version 2.0 26-2

v/c Ratio Volume-to-Capacity Ratio VMS Variable Message Sign VPD Vehicles per Day vph Vehicles per Hour VSL Variable Speed Limit VTTI Virginia Tech Transportation Institute WSS Weight-Specific-Speed 26-3 HFG ABBREVIATIONS Version 2.0

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TRB’s National Cooperative Highway Research Program (NCHRP) Report 600: Human Factors Guidelines for Road Systems: Second Edition provides data and insights of the extent to which road users’ needs, capabilities, and limitations are influenced by the effects of age, visual demands, cognition, and influence of expectancies.

NCHRP Report 600 provides guidance for roadway location elements and traffic engineering elements. The report also provides tutorials on special design topics, an index, and a glossary of technical terms.

The second edition of NCHRP 600 completes and updates the first edition, which was published previously in three collections.

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