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94 ABBREVIATIONS AND ACRONYMS 2R Resurfacing and Restoration 3R Resurfacing, Restoration and Rehabilitation AADT Annual average daily traffic AASHTO American Association of State Highway and Transportation Officials ANCOVA analysis of covariance BAT Brightness Acuity Tester DAS Data Acquisition System DOT Department of Transportation ECE Economic Commission for Europe ENV Enhanced Night Visibility FHWA Federal Highway Administration FMVSS Federal Motor Vehicle Safety Standard GPS Global Positioning System GRE Group Rapporteurs Eclairage GTB Groupe de Travail-Bruxelles 1952 HHB halogen high beam HID High-intensity discharge HLB halogen low beam HLB-LP low-profile halogen low beam K rate of vertical curvature LED light-emitting diode mph miles per hour RRR Resurfacing, Restoration and Rehabilitation SAE Society of Automotive Engineers
95 SD sight distance SNK Student-Newman-Keuls grouping SSD stopping sight distance V speed VDOT Virginia Department of Transportation VOA visually/optically aimable VOL headlamps aimed using the vertical gradient to the left of vertical VOLHID visually optically aligned left high-intensity discharge VOR headlamps aimed using the vertical gradient to the right of vertical VORHAL visually optically aligned right halogen VORHID visually optically aligned right high-intensity discharge VPD vehicles per day VPI Vertical Point of Intersection VDOT Virginia Department of Transportation VTTI Virginia Tech Transportation Institute
