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  • Volume 21, Issue 6
  • Assessing the reliability and validity of direct observation and traffic camera streams to measure helmet and motorcycle use

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Assessing the reliability and validity of direct observation and traffic camera streams to measure helmet and motorcycle use

 

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Apr 20155011
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Aug 20151800
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Oct 20151710
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Jun 20186320
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Aug 20182910
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Dec 20185423
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Aug 20201000
Sep 20202421
Oct 20202100
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Dec 20201400
Jan 20211800
Feb 20211400
Mar 20211800
Apr 2021400
May 2021200
Jun 2021220
Aug 2021112
Oct 20211900
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Dec 20211504
Jan 20221430
Feb 20223710
Mar 20221200
Apr 20223700
May 20224100
Jun 20223420
Jul 20221710
Aug 20225400
Sep 20225000
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Jan 20231610
Feb 20234000
Mar 2023800
Apr 2023610
May 20231600
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Total3571123114