If an electronic version is not available and no instructions on how to obtain it are given, contact the TTI Library. TTI reports and products are available for download at no charge. Report Number:Ġ-4984-1 Electronic Link(s): Document/Product Recognition analysis showed a decrease in recognition distance when the FHWA font was replaced with the Clearviewį ont, the researchers recommend that TxDOT continue using the FHWA font series for negative contrast signs. Recognition or legibility distances for any of the Clearview fonts tested, and because the results of the nighttime Therefore, because there were no statistically significant increases in The ascending strokes of the Standard Alphabet lower-case letters extend to the same height as the initial upper-case. For the Standard Alphabets, the MUTCD recommends 75 of the upper-case letter height, which corresponds to 100 of the lower-case loop height. The recognition distance provided by traffic signs can be considered one of the most critical measures ofĮffectiveness when assessing sign performance. A: Interline spacing is determined by the letter height within the lines of legend. In this instance, the straight replacement ofĬlearview did not achieve similar recognition distances as the FHWA font series until the stroke width was increased The results of this research project show that the Clearview font provides the same performance as the current FHWA font series for negativeĬontrast traffic signs with the exception of the nighttime recognition. The field study compared the standard font to three treatments of the Clearview font. The field study was a dynamic recognition and legibility test using full-sized retroreflective signs during the day and at night. The laptop survey used static, in-context sign images to compare sign fonts. ![]() The researchers performed a laptop-based presentation survey and a closed-course field study. This research project evaluated the negative contrast Clearview font in black letters on fluorescent yellow, fluorescent orange, and white backgrounds. Prior to this research project, there were no studies documenting the performance of the Clearview font for negative contrast signs such as those found in the regulatory and warning sign series. As such, the Federal Highway Administration (FHWA) is killing off Clearview after 12 years, and all new highway signs again be labeled in Highway Gothic, the old standard font. The Clearview font has been developed with two sets of fonts¿one for positive contrast signs and another for negative contrast signs. ![]() These results have helped support the adoption of the Clearview font into the Federal Highway Administration¿s (FHWA) Standard Highway Signs book. Additional studies have shown that Clearview outperforms other versions of Highway Gothic fonts on other, smaller types of guide signs. Texas Department of Transportation (TxDOT) sponsored research has shown that the Clearview font provides longer legibility distances than the Highway Gothic font Series E (Modified) when used on freeway guide signs with positive contrast of white letters on a dark background.
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