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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
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      <title>TIME-TO-COLLISION ESTIMATION IN A SIMULATED DRIVING TASK</title>
      <link>https://trid.trb.org/View/463466</link>
      <description><![CDATA[Three experiments are reported that examine the role of visual information in the estimation of time to collision.  Participants were shown video clips taken from within a car as it approached a stationary target.  In the first two experiments, the videos were occluded either at a constant time before collision or at a constant distance from the collision.  Approach velocity and viewing time were also manipulated.  The third experiment again varied approach velocity but did not occlude the video prior to collision with the target.  In all three experiments the participants were required to press a pedal when they estimated that collision occurred.  Results from all experiments indicated that approach velocity had the greatest influence on the accuracy of collision estimation, and accuracy improved with increasing velocity.  Varying viewing time from 1 to 8 s had little effect on estimation accuracy.  These results emphasize the role of global optic flow rate in the judgment of time of collision.]]></description>
      <pubDate>Tue, 20 Aug 1996 00:00:00 GMT</pubDate>
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      <title>FERRY LANDING DESIGN CRITERIA II: VESSEL TRACKING METHODS FOR FERRY LANDING DESIGN. FINAL TECHNICAL REPORT</title>
      <link>https://trid.trb.org/View/381390</link>
      <description><![CDATA[Methods for recording the approach path and approach velocity of berthing vessels are developed and tested.  Methods include video camera observations from shore, video camera observations of the radar screen, and global positioning system (GPS) tracking.  The methods are tested on the Washington State Ferry Edmonds to Kingston crossing.  The video methods are useful for preliminary studies to obtain approximate results and familiarize investigators with the berthing process.  The GPS records provide more precise results with less data reduction effort than other methods.  Twenty-four berthing maneuvers are recorded.  Analysis of the GPS record shows a consistent pattern of velocity reductions as the vessel nears the landing structure.]]></description>
      <pubDate>Tue, 01 Feb 1994 00:00:00 GMT</pubDate>
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