Efficacy of red and yellow turn arrows in traffic signals : final report
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1975-01-01
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Main Document Checksum:urn:sha-512:5a87830c4d504ab9f8df8b92daa77f71660c713074f6aa99c383b69dd71fe43914a7a2270d527f591e35c737c8a05484b6c4fcfa93b1e1c2b0c5b4c1c748fafe
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