原文传递
PRESIGNALS: CURRENT APPLICATIONS AND ISSUES.
| 题名： | PRESIGNALS: CURRENT APPLICATIONS AND ISSUES. |
| 作者： | Ogden-BD |
| 关键词： | Grade-crossing-protection-systems; Highway-safety; Light-rail-transit; Policy-; Presignals-; Railroad-grade-crossings; Transit-safety |
| 摘要： | Applications and technical issues related to using presignals to improve the safety of at-grade light rail transit crossings are discussed. A presignal installation has roadway traffic signal heads placed ahead of a downstream, signalized frontage roadway intersection and the stop bar displaced in advance of the grade crossing. This signal ensures that a vehicle stops at a red traffic light before the grade crossing area and the clear-storage zone between the grade crossing and downstream intersection. Presignals have been used for many years and are a state standard in Michigan and South Carolina. However, a tragic accident in which a school bus was hit by a METRA commuter train in Fox River Grove, Illinois, brought renewed attention to this treatment. The state of Illinois installed a presignal at the Fox River Grove grade crossing and has developed a statewide policy for the use of presignals elsewhere. Background is provided on presignals, including alternative types of queue control using traffic signals. The key design features of a presignal installation are highlighted. Outstanding technical issues are identified, including future research to refine policies or warrants for presignals and applicable design standards. |
| 总页数： | Transportation Research Record. 2001. (1762) pp25-31 (7 Phot., 5 Fig.) |
| 报告类型： | 科技报告 |
相关文献
检索历史
应用推荐
