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To search an exact document title or key phrase, place quotations around the text. Example: "U.S. Government Grade Crossing Research & Stakeholder Engagement" Entering keywords without quotations will search the eLibrary for all occurrences of the keywords.
Keywords: Photogrammetry, line-of-sight, grade crossing, railroad safety
Abstract: FRA evaluated the effectiveness of using drones and photogrammetry software to conduct line-of-sight analyses of selected grade crossings. Researchers selected crossings with...
FRA evaluated the effectiveness of using drones and photogrammetry software to conduct line-of-sight analyses of selected grade crossings. Researchers selected crossings with...
Keywords: E-ATC, PTC, braking enforcement
Keywords: Quasi-Moving Block (QMB), next generation track circuit, NGTC, track circuit enhancements
Keywords: Automated Track Inspection Program, machine vision, data products, imaging systems
Keywords: Probability of detection, MAPOD, ultrasonic rail flaw inspection