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Boulevard Road Avenue Street
Boulevard Stop Sign Vintage
San Diego Sheriff's Museum.
From the LA Dept of Transportation:
"California is the only state in the nation to have always had red Stop signs. All other states have used yellow Stop signs.
In 1924, the First National conference on Street and Highway safety recommended white on red for Stop signs. The Automobile Club of Southern California (ACSC) and the California State Automobile Association (CSAA) responded by developing a porcelain enamel Boulevard Stop sign with white letters on a red background using the established diamond shape.
In 1927, the American Association of State Highway Officials (AASHO) developed a manual on signing for rural areas. This manual adopted the octagon as the shape for Stop signs. But after much debate, yellow was adopted as the background color for danger, caution and Stop signs. The red color for Stop signs was rejected, due to inadequate visibility at night. ACSC and CSAA then adopted the octagonal shape but not the yellow color for Stop signs. They addressed the concern for night-time visibility by the use of glass button letters. California thus refused to join the rest of the nation and was the only state to retain the red Stop sign.
Ultimately, the holdout state was able to gloat when in 1954, the MUTCD changed the color of the Stop sign from red or black on yellow to white on red."
| Create Date : 19 กรกฎาคม 2554 |
| Last Update : 19 กรกฎาคม 2554 20:07:33 น. |
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โดย: thip056  วันที่: 21 มกราคม 2555 เวลา:15:17:02 น. |
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| oozingplanet |
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