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EVALUATION OF DOWNHILL TRUCK SPEED WARNING SYSTEM ON I-70 WEST OF EISENHOWER TUNNEL.
| 题名： | EVALUATION OF DOWNHILL TRUCK SPEED WARNING SYSTEM ON I-70 WEST OF EISENHOWER TUNNEL. |
| 作者： | Janson-B |
| 关键词： | Awareness-; Colorado-; Compliance-; Descent-; Downgrades-Roads; Speed-; Truck-accidents; Truck-drivers; Truck-traffic; Trucking-safety; Trucks-; Tunnels-; Variable-message-signs; Warning-systems; Weigh-in-motion; Weight- |
| 摘要： | The purpose of this study is to evaluate the effectiveness of the downhill truck speed warning system (DTSWS) installed in the westbound lanes of Eisenhower Tunnel on I-70 in Colorado. The DTSWS uses weigh-in-motion technology and a message display sign. A long downgrade of at least 10 miles with -5% to -7% grades follows the tunnel. From 1990-1998 there were 125 truck-related accidents on this 10-mile downgrade. The primary measures of effectiveness investigated by this study are driver awareness and driver compliance. Results of the study suggest that the speed warning system appears to significantly reduce truck descent speeds for almost all weight ranges above the 40,000 pound minimum to which the warning system responds. |
| 总页数： | 1999/12/15. pp34 (Figs., Tabs., 1 App.) |
| 报告类型： | 科技报告 |
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