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TFHRC HOSTS COLLABORATIVE RETROREFLECTIVE TESTING EFFORT.
| 题名： | TFHRC HOSTS COLLABORATIVE RETROREFLECTIVE TESTING EFFORT. |
| 关键词： | BLACK-; LABORATORY-TESTS; MEASURING-INSTRUMENTS; RETROREFLECTIVITY-; ROAD-MARKING-MATERIALS; TECHNOLOGY-ASSESSMENT; U.S.-FEDERAL-HIGHWAY-ADMINISTRATION; WHITE-; YELLOW- |
| 摘要： | The Photometric and Visibility Laboratory at the Federal Highway Administration's Turner-Fairbank Highway Research Center (TFHRC) in McLean, Virginia, served as one of several testing sites for the Highway Innovative Technology Evaluation Center's (HITEC) study on the retroreflectivity of highway pavement markings. HITEC tested six retroreflectometers--instruments that measure the reflective properties of roadway markings--in various lit and darkened conditions at the laboratory. Of the six units, four were handheld devices and two were mobile models mounted on vans. The devices measured the retroreflectivity of three different sets of panels with eight samples in each set. The samples included a black panel, five white panels, and two yellow panels. In September 1999, six individual reports will be published--one for each participating technology. A summary report will be published in November 1999. |
| 总页数： | Public Roads. 1999/11. 63(3) pp10-11 (3 Phot.) |
| 报告类型： | 科技报告 |
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