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Guidelines for Nighttime Visibility of Overhead Signs. National Cooperative Highway Research Program (NCHRP) has Released a Non-Edited, Pre-Publication Version of Report 828
| 题名： | Guidelines for Nighttime Visibility of Overhead Signs. National Cooperative Highway Research Program (NCHRP) has Released a Non-Edited, Pre-Publication Version of Report 828 |
| 作者： | Brimley, B. K.;Miles, J.;Chrysler, S.;Gibbons, R.;Terry, T.; |
| 关键词： | Guidelines;Nighttime visibility;Overhead signs;Highway;Research program;Roadway signs;Visual Complexity;Retroreflectivity;Nighttime driver needs;Sign luminance;Roadway assets; |
| 摘要： | National Cooperative Highway Research Program (NCHRP) has released a non-edited, pre-publication version of Report 828: Guidelines for Nighttime Visibility of Overhead Signs. While the Manual on Uniform Traffic Control Devices (MUTCD) provides minimum retro-reflectivity standards for overhead signs, there are few guidelines that agencies can reference to decide how to provide sufficient nighttime performance of overhead signs in site-specific situations. This report explores legibility distances for drivers in controlled conditions and the effects of sign luminance and visual complexity on the distance at which a driver can read overhead signs and street signs. The report presents proposed guidelines for nighttime overhead sign visibility, formatted as a potential replacement for the current Chapter 10, Roadway Sign Lighting, in the 2005 AASHTO Roadway Lighting Design Guide. |
| 总页数： | Brimley, B. K.;Miles, J.;Chrysler, S.;Gibbons, R.;Terry, T.; |
| 报告类型： | 科技报告 |
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