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Creating Multi?Use Highway Structures with Retrofitted Fencing to Reduce Collisions with Elk along Interstate 17
| 题名： | Creating Multi?Use Highway Structures with Retrofitted Fencing to Reduce Collisions with Elk along Interstate 17 |
| 作者： | Gagnon, J. W.; Loberger, C. D.; Sprague, S. C.; Boe, S. R.; Ogren, K. S.; Schweinsburg, R. E. |
| 关键词： | Deer##Deer-vehicle##Elk-vehicle##Traffic volume##Wildlife-vehicle collisions##Evaluation##Recommendations##Safety assessment##Elk##Fragmentation control##Telemetry##Fencing##Retrofit##Cervus canadensis##Cenvus elaphus##Permeability##Arizona (State)##Highway bridges##Overpasses##Wildlife crossing structures## |
| 摘要： | In Arizona, vehicle collisions with elk are costly and can be deadly. Dedicated wildlife crossing structures have proven effective for elk elsewhere in Arizona. Planned highway reconstruction for Interstate 17 (I?17) included such wildlife crossing structures, but when construction was delayed, an alternative was developed: extending the height of right?of?way (ROW) fencing to funnel wildlife underneath existing highway bridges and overpasses. After 5.9 mi of ROW fencing (between mileposts 316.8 and 322.7) was extended to 8 ft high, this study evaluated its effectiveness in guiding elk to cross under two large bridges and the overpass and underpass of two traffic interchanges (TIs). Following the fencing retrofit, researchers documented a 97.5 percent reduction in elk?vehicle collisions and an 88.9 percent decrease in crashes coded Animal_Wild_Game” by the Arizona Department of Public Safety (DPS) along the 5.9?mi segment of I? 17. No increase in collisions was reported within the 1?mi fence end segments or control areas. The researchers documented 217 percent and 54 percent increases in elk crossing under the Munds Canyon and Woods Canyon bridges, respectively, but no elk use of the modified TIs (Fox Ranch Road and Schnebly Hill Road). Following the retrofit, fence maintenance costs did not increase or exceed those of adjacent sections. Using the Huijser et al. (2009) estimated cost of $17,483 per elk?vehicle collision, the documented level of collision reduction will recoup retrofitting costs in less than five years. The findings indicate that fencing retrofits can reduce wildlife?vehicle collisions if given appropriate circumstances, such as adequate size and spacing of existing highway structures. |
| 总页数： | 70 |
| 报告类型： | 科技报告 |
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