Evaluation of the Buckeye Crossbuck at public, passive railroad/highway grade crossings in Ohio : executive summary.
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Evaluation of the Buckeye Crossbuck at public, passive railroad/highway grade crossings in Ohio : executive summary.

Filetype[PDF-83.64 KB]

  • English

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    • Edition:
      Executive summary
    • NTL Classification:
      NTL-RAIL TRANSPORTATION-Railroad Highway Grade Crossings
    • Abstract:
      Two new crossbuck designs for use at passive Railroad/Highway Grade Crossings (RRX) were evaluated.

      The Standard Improved and the Buckeye crossbuck were evaluated on a state-wide basis in Ohio with

      respect to their potential to alter driver risk taking behavior (part I), their crash reduction potential (part II),

      user acceptance (part III), and with respect to their photometric performance at night (part IV). It was found

      that the percentage of non-compliant drivers was approximately the same for both crossbuck designs with

      slightly more conservative risk acceptance times obtained for the Buckeye crossbuck. Based on the last 10

      years of Ohio Railroad/Highway Grade Crossings crash history the overall number of crashes at passive

      Railroad/Highway Grade Crossings has continued to drop. Overall, the crash numbers in part II show a

      statistically significant (α = 0.05) superiority of the Buckeye crossbuck: 157 crashes for Buckeye crossbuck

      vs. 192 crashes for Standard Improved crossbuck (22% decrease in crashes) from 1994 until June 30th,

      1999. A user acceptance survey indicated an overwhelming preference of the Buckeye Crossbuck among

      all surveyed user groups. The Buckeye Crossbuck provides by far the strongest visual signal among the

      measured crossbucks at night and during daytime. Photometric crossbuck luminance measurements

      conducted under automobile low-beam illumination at night indicate that due to their increased

      reflectorization, both the Buckeye Crossbuck and Standard Improved Crossbuck provide superior visual

      stimuli to an approaching driver at night. The positive effect of the Buckeye Crossbuck on crash numbers is

      more pronounced during daytime than during nighttime. The nighttime and daytime proportions of the

      crash frequencies separately still favor the Buckeye Crossbuck. The multi-faceted, fully reflectorized

      (micro-prismatic type VII, long distance performance LPD) shield makes a Buckeye Crossbuck the

      brightest and visually most powerful crossbuck design evaluated in this study. In addition, the angled shield

      makes the Buckeye Crossbuck less sensitive to placement in approaches that are not straight or

      perpendicular to the railroad tracks, and the red YIELD legend on the shield has the potential to instill into

      drivers, close to the Railroad/ Highway Grade Crossing, the idea that they must yield to approaching trains.

      It is also important to note that, especially at night, both the Standard Improved Crossbuck and the Buckeye

      Crossbuck designs provide an approaching driver with a reflectorized ( bright) target on both sides of the

      tracks, which makes it possible for a driver to determine if a Railroad/ Highway Grade Crossing is

      occupied by a train (left crossbuck either fully or partially obstructed by railroad cars).

      It is recommended to amend the national standard for crossbucks at public passive Railroad/Highway

      Grade Crossings in the MUTCD and to include the Buckeye crossbuck as an alternate design.

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