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Extracted from Consolidated Report
This investigation was originally published as part of a larger consolidated report containing multiple investigations. View the consolidated PDF for the complete document.
⚠️ Translation Notice: This content has been automatically translated. The original English text is the official version. Translation may contain errors.
⚠️ Este contenido ha sido traducido automáticamente. El texto original en inglés es la versión oficial. La traducción puede contener errores.
Findings 18 findings
F1
Page 97
Accident frequencies have not been the sole consideration for RLC usage.
F2
Page 97
2003 accident data used to justify initial RLC installations cannot be substantiated by City of Marysville due to data purging.
F3
Page 97
2003 accident data used to justify initial RLC installation conflict with TASAS collision data.
F4
Page 97
TASAS collision data did not justify RLC installation at 10th & G or at 3rd & E.
F5
Page 97
TASAS collision data did not justify City of Marysville’s request for RLC installation at 12th & B.
F6
Page 97
TASAS collision data did justify City of Marysville’s request for RLC installation at 9th & E.
F7
Page 97
The City of Marysville data do not justify RLC installation at 3rd & F or at 10th & Ramirez.
F8
Page 97
Statements by the City of Marysville officials to support claims of effects of RLCs on safety sometimes refer to citywide collision data and sometimes refer to collisions at RLC intersections.
F9
Page 97
Statements by the City of Marysville officials to support claims of effects of RLCs on safety cite data that cannot be substantiated.
F10
Page 97
Statements by the City of Marysville officials to support claims of effects of RLCs on safety cite conflicting data.
F11
Page 97
Statements by the City of Marysville officials to support claims of effects of RLCs on safety omit reference to data that do not support the assertion of safety improvement.
F12
Page 97
During the time period 2007-2012, number of accidents at RLC intersections (the City of Marysville data) account for an increasing percentage of total accidents in Marysville.
F13
Page 97
During the time period 2007-2012, number of accidents at non-RLC intersections (the City of Marysville data) account for a stable percentage of total accidents in Marysville.
F14
Page 97
Number of accidents at RLC intersections account for a relatively small percentage of total accidents in Marysville, so that use of citywide collision data to justify safety effects of RLC usage appears to be inappropriate. 2013-2014 Yuba County Grand Jury Final Report City of Marysville Red Light Camera Program
F15
Page 98
During the time period 2007-2012, there were no fatal accidents at RLC intersections.
F16
Page 98
There are broad discrepancies between the City of Marysville collision data and the State of California collision data available through TASAS.
F17
Page 98
RLCs at 3rd & F and at 10th & Ramirez result in citations almost exclusively for right-turn- on-red violations, and safety would be better served by engineering countermeasures.
F18
Page 98
RLCs at 3rd & E and at 9th & E result in approximately half of citations for right-turn-on-red violations, and safety would be better served by engineering countermeasures.
Recommendations 11
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R1Page 98Remove the RLC at 3rd & F and utilize engineering countermeasures to minimize right turn violations.
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R2Page 98Remove the RLC at 10th & Ramirez and utilize engineering countermeasures to minimize right-turn-on-red violations.
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R3Page 98Utilize engineering countermeasures to minimize right-turn-on-red violations at 3rd & E and 9th & E.
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R4Page 98Post a speed limit sign approaching the RLC at 10th & Ramirez Streets intersection.
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R5Page 98Ensure that any traffic signal right-turn arrows or left-turn arrows utilized at RLC approaches have the same yellow light interval as straight-through yellow light intervals.
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R6Page 98Increase yellow light intervals at all RLC intersections to at least one second longer than legally required minimums in order to minimize violations.
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R7Page 98Post complete statistical data for RLC approaches on the City of Marysville Police Department webpage. These data should include past and current accident statistics that are consistent with TASAS, including data for types of accidents. These data should also include number of citations issued for right-turn violations, left-turn violations, and straight- through violations. 2013-2014 Yuba County Grand Jury Final Report City of Marysville Red Light Camera Program
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R8Page 99Not install further RLCs without providing complete collision data for the intersection in question. These data should include traffic volumes, types of collision, whether collisions were in the intersection or not, and any other material to provide information consistent with TASAS.
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R9Page 99Not install further RLCs without providing complete information about engineering countermeasures that have been used.
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R10Page 99Utilize volunteers to assist with the submission of all collision data on state highways within the City of Marysville to SWITRS, so that state databases accurately reflect accident volumes within the City of Marysville.
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R11Page 99Ensure that SWITRS and the City of Marysville data, particularly for injury and fatal collisions, are concordant.