Roadside Safety Analysis Program (RSAP) Update (2022) / Chapter Skim
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20 trajectories in earlier versions of RSAP were only linear, RSAPv3 models each trajectory as a series of line segments so trajectories can be straight, curved or compound curved. Since the trajectories come from reconstructed crashes, the trajectory information also includes the velocity at each trajectory point so that driver input like braking is inherently included.
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From page 21... ...
21 The encroachment frequency data re-analysis for RSAPv3 was successful and is completely described in Appendix B The data itself, however, is limited: • The Cooper data is bounded by an upper ADT value of 30,000 vpd.
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