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            Line-of-Sight Analysis Using Drones and Photogrammetry
      

      
  Document Series
              Research Results


      
  Author
          Federal Railroad Administration


      
Report Number
              RR 21-23

  Office
              RDI-23


      Subject
                    Grade Crossing Technology,
                    Highway-Rail Grade Crossings


      
  Keywords
              Photogrammetry, line-of-sight, grade crossing, railroad safety


      

      
      
              
                  
      
              
  Document
              LoS--Drones and PhotoG-A.pdf (612.83 KB)

      
              The U. S. Department of Transportation’s (U.S. DOT) John A. Volpe National Transportation Systems Center (Volpe), under the direction of the U.S. DOT Federal Railroad Administration (FRA) Office of Research, Development and Technology (RD&T), evaluated the effectiveness of using drones and photogrammetry software to conduct line-of-sight analyses of selected grade crossings. Researchers selected crossings with no active warning equipment nor stop signs for this study because they assumed drivers would stop upon seeing a train approach. This study aimed to determine if conditions allowed for sufficient time to stop, given the visual obstructions that exist.
      
            
      
      
              Last updated: Monday, November 29, 2021 U.S. DEPARTMENT OF TRANSPORTATION

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