8/14/2019 MODOT Red Light Camera Enforcement Study Raw Data

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BeforePeriod

AfterPeriod

1 4 2 22 17 10.2952 4 2 58 41 5.8563 4 3 11 12 7.8184 4 3 106 119 21.1075 4 3 14 80 370.3166 3 3 9 8 -3.9207 4 3 36 69 90.4438 4 3 75 73 4.7339 4 3 56 53 16.052

10 4 2 41 34 42.15611 4 2 36 44 118.69112 4 2 93 70 40.36513 3 2 53 37 27.51114 4 2 132 92 19.16515 4 2 55 30 -10.80216 4 2 120 68 9.67117 4 2 175 133 25.30518 4 2 18 9 -2.96519 4 2 8 9 110.71720 4 2 3 1 -63.82621 4 2 43 19 -7.67822 4 2 26 18 4.23623 4 2 13 10 26.68924 4 2 5 1 -77.48725 4 2 5 3 -27.55926 4 2 57 42 -3.64827 4 2 60 42 6.59928 4 1 115 36 -4.00029 4 1 128 41 10.89230 4 1 134 31 -25.40231 4 1 11 3 -25.91532 4 1 19 2 -68.69433 4 1 100 35 15.46434 4 1 1 0 -100.00035 4 1 54 26 68.643

36 4 1 91 6 -78.74837 4 1 13 2 -63.92438 4 1 28 6 -29.82539 4 1 64 28 37.93040 4 1 12 2 -51.11141 4 1 38 10 -18.31442 4 1 65 23 33.19643 4 1 68 39 77.16844 4 1 46 19 31.93345 4 1 89 20 -31.94146 4 1 11 3 -28.28047 4 1 75 14 -49.21248 4 1 11 3 -28.88849 4 1 17 4 -33.202

50 4 1 75 10 -59.55751 4 1 17 3 -26.53752 4 1 35 22 73.96353 4 1 117 42 -2.03354 4 1 134 43 -15.50455 4 1 104 37 12.149

14.0%

We included 55 intersections in our analysis. The other 33 intersections were installed recently and did not have a minimum of one year of data for the afterperiod. We used a program developed by Midwest Research Institute (MRI) that is based on an Empirical Bayes (EB) analysis. The EB analysis has become theaccepted method to evaluate safety improvements and confirms the change in crashes was a r esult of the improvement and not just the random fluctuation incrashes that can occur from year to year. The recent release of AASHTO's Highway Safety Manual encourages this approach for all evaluations. The EB analysisallows us to account for variations among different intersections and puts all those intersections on a level playing field. For example, one intersection may havehad the Automated Enforcement for one year while the next intersection has had it for 4 years, traffic volumes differ from site to site and intersection geometry(3 approaches vs. 4 approaches).

Total Crashes (All Crash Types)

Number IntersectionObserved Crashes Empirical

Bayes %Change

# ofApproaches

# of Years of"After" Data

US 67 at Elm Grove

US 61 at MO 168US 61 at PleasantMO 291 at CourtneyUS 61 at MO 141OR 55 at IS 55 (Richardson/Vogel)US 61 at Rockport SchoolMO 141 at Astra WayOR 270 (Graham/N Hanley at Dunn)US 67 at TrotterwayUS 67 at Manresa LnUS 67 at Lindsay/St Denis

RT AB at Coeur De Ville

US 67 at McDonnell BlvdUS 67 at RT ACMO 115 at RT UMO 180 at IS 170 (SPUI)MO 115 at Kingshighway BlvdUS 67 at Utz LnOR 270 (US 67 SB Ramps at Lynn Haven)CST Lynn Haven Ln at Taylor RdUS 67 at Fee Fee HillsOR 270 (N Hanley at Pershall)CST Ladue Rd at IS 270/Emerson

MO 100 at Grand Blvd

MO 115 at Clearview/WestMO 94 at Central SchoolMO 340 at IS 270 (SPUI)MO 100 at Kingshighway BlvdMO 115 at Grand AveMO 115 at Goodfellow BlvdCST Goodfellow Blvd at IS 70 WB RampsCST Goodfellow Blvd at IS 70 EB RampsMO 115 at Union BlvdRT N at McCluer High SchoolMO 30 at Hampton/Germania

CST West Florissant Ave at Bircher/E Taylor

MO 367 at BerwynMO 180 at St GregoryCST Jefferson Ave at IS 44 WB RampsRT U at San DiegoMO 180 at AdieOR 270 (Washington at Dunn)RT D at Kingshighway BlvdMO 180 at BrownMO 180 at RT B (Natural Bridge)MO 180 at IS 270 EMO 180 at McKelvey

MO 13 at MO 413 (Sunshine)

Combined Sites

CST Grand Blvd at Detonty/IS 44 EB (on ramp)

CST Grand Blvd at Lafayette AveOR 70 (SOR at Wentzville Pkwy)LP 44 at LP 44 (Chestnut)BU 65 at BattlefieldBU 65 at RT D (Sunshine)

8/14/2019 MODOT Red Light Camera Enforcement Study Raw Data

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BeforePeriod

AfterPeriod

1 4 2 1 0 -100.0002 4 2 1 3 418.3783 4 3 0 0 -100.0004 4 3 2 0 -100.0005 4 3 0 0 -100.0006 3 3 1 0 -100.0007 4 3 0 1 155.6648 4 3 1 0 -100.0009 4 3 1 0 -100.000

10 4 2 1 0 -100.00011 4 2 0 0 -100.00012 4 2 0 0 -100.00013 3 2 3 1 18.42014 4 2 0 1 252.09415 4 2 1 0 -100.00016 4 2 0 0 -100.00017 4 2 0 3 1011.51318 4 2 0 0 -100.00019 4 2 1 0 -100.00020 4 2 1 0 -100.00021 4 2 3 0 -100.00022 4 2 0 0 -100.00023 4 2 0 0 -100.00024 4 2 0 0 -100.00025 4 2 1 0 -100.00026 4 2 0 0 -100.00027 4 2 0 1 271.72528 4 1 1 0 -100.00029 4 1 4 1 55.82230 4 1 4 2 191.79131 4 1 0 0 -100.00032 4 1 0 0 -100.00033 4 1 0 1 663.57234 4 1 0 0 -100.00035 4 1 1 0 -100.000

36 4 1 0 0 -100.00037 4 1 1 0 -100.00038 4 1 2 0 -100.00039 4 1 1 0 -100.00040 4 1 0 0 -100.00041 4 1 0 0 -100.00042 4 1 0 0 -100.00043 4 1 2 0 -100.00044 4 1 1 0 -100.00045 4 1 3 1 71.44646 4 1 0 0 -100.00047 4 1 1 0 -100.00048 4 1 0 1 696.32149 4 1 0 0 -100.000

50 4 1 0 0 -100.00051 4 1 0 0 -100.00052 4 1 0 1 656.60653 4 1 0 0 -100.00054 4 1 1 0 -100.00055 4 1 3 0 -100.000

-12.1%

We included 55 intersections in our analysis. The other 33 intersections were installed recently and did not have a minimum of one year of data for the afterperiod. We used a program developed by Midwest Research Institute (MRI) that is based on an Empirical Bayes (EB) analysis. The EB analysis has become theaccepted method to evaluate safety improvements and confirms the change in crashes was a r esult of the improvement and not just the random fluctuation incrashes that can occur from year to year. The recent release of AASHTO's Highway Safety Manual encourages this approach for all evaluations. The EB analysisallows us to account for variations among different intersections and puts all those intersections on a level playing field. For example, one intersection mayhave had the Automated Enforcement for one year while the next intersection has had it for 4 years, traffic volumes differ from site to site and intersectiongeometry (3 approaches vs. 4 approaches).

Total Severe Crashes (All Crash Types)

Number IntersectionObserved Crashes Empirical

Bayes %Change

# ofApproaches

# of Years of"After" Data

US 67 at Elm Grove

US 61 at MO 168US 61 at PleasantMO 291 at CourtneyUS 61 at MO 141OR 55 at IS 55 (Richardson/Vogel)US 61 at Rockport SchoolMO 141 at Astra WayOR 270 (Graham/N Hanley at Dunn)US 67 at TrotterwayUS 67 at Manresa LnUS 67 at Lindsay/St Denis

RT AB at Coeur De Ville

US 67 at McDonnell BlvdUS 67 at RT ACMO 115 at RT UMO 180 at IS 170 (SPUI)MO 115 at Kingshighway BlvdUS 67 at Utz LnOR 270 (US 67 SB Ramps at Lynn Haven)CST Lynn Haven Ln at Taylor RdUS 67 at Fee Fee HillsOR 270 (N Hanley at Pershall)CST Ladue Rd at IS 270/Emerson

MO 100 at Grand Blvd

MO 115 at Clearview/WestMO 94 at Central SchoolMO 340 at IS 270 (SPUI)MO 100 at Kingshighway BlvdMO 115 at Grand AveMO 115 at Goodfellow BlvdCST Goodfellow Blvd at IS 70 WB RampsCST Goodfellow Blvd at IS 70 EB RampsMO 115 at Union BlvdRT N at McCluer High SchoolMO 30 at Hampton/Germania

CST West Florissant Ave at Bircher/E Taylor

MO 367 at BerwynMO 180 at St GregoryCST Jefferson Ave at IS 44 WB RampsRT U at San DiegoMO 180 at AdieOR 270 (Washington at Dunn)RT D at Kingshighway BlvdMO 180 at BrownMO 180 at RT B (Natural Bridge)MO 180 at IS 270 EMO 180 at McKelvey

MO 13 at MO 413 (Sunshine)

Combined Sites

CST Grand Blvd at Detonty/IS 44 EB (on ramp)

CST Grand Blvd at Lafayette AveOR 70 (SOR at Wentzville Pkwy)LP 44 at LP 44 (Chestnut)BU 65 at BattlefieldBU 65 at RT D (Sunshine)

8/14/2019 MODOT Red Light Camera Enforcement Study Raw Data

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BeforePeriod

AfterPeriod

1 4 2 1 0 -100.0002 4 2 0 1 256.3043 4 3 0 0 -100.0004 4 3 0 0 -100.0005 4 3 0 0 -100.0006 3 3 0 0 -100.0007 4 3 0 1 284.7958 4 3 0 0 -100.0009 4 3 1 0 -100.000

10 4 2 0 0 -100.00011 4 2 0 0 -100.00012 4 2 0 0 -100.00013 3 2 2 1 55.13614 4 2 0 0 -100.00015 4 2 0 0 -100.00016 4 2 0 0 -100.00017 4 2 0 1 461.65318 4 2 0 0 -100.00019 4 2 0 0 -100.00020 4 2 0 0 -100.00021 4 2 0 0 -100.00022 4 2 0 0 -100.00023 4 2 0 0 -100.00024 4 2 0 0 -100.00025 4 2 0 0 -100.00026 4 2 0 0 -100.00027 4 2 0 0 -100.00028 4 1 0 0 -100.00029 4 1 1 1 215.34930 4 1 1 1 196.40731 4 1 0 0 -100.00032 4 1 0 0 -100.00033 4 1 0 0 -100.00034 4 1 0 0 -100.00035 4 1 1 0 -100.00036 4 1 0 0 -100.00037 4 1 0 0 -100.00038 4 1 1 0 -100.00039 4 1 0 0 -100.00040 4 1 0 0 -100.00041 4 1 0 0 -100.00042 4 1 0 0 -100.00043 4 1 0 0 -100.00044 4 1 0 0 -100.00045 4 1 1 0 -100.00046 4 1 0 0 -100.00047 4 1 0 0 -100.00048 4 1 0 0 -100.00049 4 1 0 0 -100.00050 4 1 0 0 -100.00051 4 1 0 0 -100.00052 4 1 0 0 -100.00053 4 1 0 0 -100.00054 4 1 0 0 -100.00055 4 1 0 0 -100.000

-44.7%

We included 55 intersections in our analysis. The other 33 intersections were installed recently and did not have a minimum of one year of data for the afterperiod. We used a program developed by Midwest Research Institute (MRI) that is based on an Empirical Bayes (EB) analysis. The EB analysis has become theaccepted method to evaluate safety improvements and confirms the change in crashes was a result of the improvement and not just the random fluctuationin crashes that can occur from year to year. The recent release of AASHTO's Highway Safety Manual encourages this approach for all evaluations. The EBanalysis allows us to account for variations among different intersections and puts a ll those intersections on a level playing field. For example, oneintersection may have had the Automated Enforcement for one year while the next intersection has had it for 4 years, traffic volumes differ from site to siteand intersection geometry (3 approaches vs. 4 approaches).

Right Angle Severe Crashes

Number IntersectionObserved Crashes Empirical

Bayes %Change

# ofApproaches

# of Years of"After" Data

US 67 at Elm Grove

US 61 at MO 168US 61 at PleasantMO 291 at CourtneyUS 61 at MO 141OR 55 at IS 55 (Richardson/Vogel)US 61 at Rockport SchoolMO 141 at Astra WayOR 270 (Graham/N Hanley at Dunn)US 67 at TrotterwayUS 67 at Manresa LnUS 67 at Lindsay/St Denis

RT AB at Coeur De Ville

US 67 at McDonnell BlvdUS 67 at RT ACMO 115 at RT UMO 180 at IS 170 (SPUI)MO 115 at Kingshighway BlvdUS 67 at Utz LnOR 270 (US 67 SB Ramps at Lynn Haven)CST Lynn Haven Ln at Taylor RdUS 67 at Fee Fee HillsOR 270 (N Hanley at Pershall)CST Ladue Rd at IS 270/Emerson

MO 100 at Grand Blvd

MO 115 at Clearview/WestMO 94 at Central SchoolMO 340 at IS 270 (SPUI)MO 100 at Kingshighway BlvdMO 115 at Grand AveMO 115 at Goodfellow BlvdCST Goodfellow Blvd at IS 70 WB RampsCST Goodfellow Blvd at IS 70 EB RampsMO 115 at Union BlvdRT N at McCluer High SchoolMO 30 at Hampton/Germania

CST West Florissant Ave at Bircher/E Taylor

MO 367 at BerwynMO 180 at St GregoryCST Jefferson Ave at IS 44 WB RampsRT U at San DiegoMO 180 at AdieOR 270 (Washington at Dunn)RT D at Kingshighway BlvdMO 180 at BrownMO 180 at RT B (Natural Bridge)MO 180 at IS 270 EMO 180 at McKelvey

MO 13 at MO 413 (Sunshine)

Combined Sites

CST Grand Blvd at Detonty/IS 44 EB (on ramp)CST Grand Blvd at Lafayette AveOR 70 (SOR at Wentzville Pkwy)LP 44 at LP 44 (Chestnut)BU 65 at BattlefieldBU 65 at RT D (Sunshine)