MOBILITY TRENDS AND COVID-19 IN THE Hani Mahmassani CITY OF - - PowerPoint PPT Presentation

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MOBILITY TRENDS AND COVID-19 IN THE Hani Mahmassani CITY OF - - PowerPoint PPT Presentation

Dec 21, 2022 260 likes •368 views

Divyakant Tahlyan MOBILITY TRENDS AND COVID-19 IN THE Hani Mahmassani CITY OF CHICAGO: APRIL 29, 2020 Northwestern University Transportation Center MAIN TAKEAWAYS 1. Number of vehicle crashes in Chicago continues to be slowly ticking back

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MOBILITY TRENDS AND COVID-19 IN THE CITY OF CHICAGO: APRIL 29, 2020

Divyakant Tahlyan Hani Mahmassani Northwestern University Transportation Center

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MAIN TAKEAWAYS

  • 1. Number of vehicle crashes in Chicago continues to be slowly ticking back up after

its low in the wek of March 22-28, but remains about 50% below the levels of the pre-shelter in place order.

  • 2. Crash severity in relative frequency terms continues to be above its pre-lockdown

level, though appears to be gradually decreasing from peak reached in week of March 29-April 4– but not the percentage of fatal crashes, which is higher in the past two weeks than the week of March 29-April 4.

  • 3. Crashes involving pedestrians continue a decreasing trend since the lockdown,

though the percentage of fatalities is higher post-lockdown.

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CRASHES IN THE CITY OF CHICAGO

2019 VERSUS 2020 Looks like the number of daily crashes are on a slight upward trend over the last 2- 3 weeks

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This is an animation, see in presentation mode

WEEKLY NUMBER OF CRASHES

MARCH 1 TO APRIL 25, 2020

Weekly snapshots in next slide

2048 2053 1330 824 905 876 985 1016 500 1000 1500 2000 2500 M a r 1

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Number of Crashes Time Period

Number of Crashes per Week

2050.5 1691.5 1077 864.5 890.5 930.5 1000.5 500 1000 1500 2000 2500 M a r 1

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Number of Crashes Time Period

2-Week Rolling Average

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CRASHES BY SEVERITY TYPE

85.64 5.18 6.88 1.66 0.05 84.90 4.92 7.55 1.75 0.05 83.61 4.44 8.50 2.11 0.00 83.25 4.37 9.10 2.18 0.12 83.31 4.42 8.51 2.65 0.22 84.59 5.82 6.51 2.17 0.23 86.80 3.15 7.41 2.03 0.41 84.74 3.84 9.06 1.77 0.30 0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 'NO INDICATION OF INJURY' 'REPORTED, NOT EVIDENT' 'NONINCAPACITATING INJURY' 'INCAPACITATING INJURY' FATAL' Percentage Injury Severity Mar 1 - Mar 7 Mar 8 - Mar 14 Mar 15 - Mar 21 Mar 22 - Mar 28 Mar 29 - Apr 4 Apr 5 - Apr 11 Apr 12 - Apr 18 Apr 19 - Apr 25

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PEDESTRIAN CRASHES

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PEDESTRAIN CRASHES PER WEEK

62 48 37 25 34 27 14 24 10 20 30 40 50 60 70 M a r 1

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Number of Crashes Time Period

Number of Pedestrain involved Crashes

55 42.5 31 29.5 30.5 20.5 19 10 20 30 40 50 60 M a r 1

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Number of Crashes Time Period

2 Week Rolling Average

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PEDESTRAIN CRASHES’ SEVERITY

14.52 24.19 46.77 14.52 0.00 18.75 18.75 52.08 10.42 0.00 13.51 18.92 56.76 10.81 0.00 8.00 8.00 60.00 20.00 4.00 32.35 8.82 38.24 17.65 2.94 11.11 29.63 29.63 25.93 3.70 7.14 7.14 64.29 21.43 0.00 12.50 8.33 66.67 8.33 4.17 0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 'NO INDICATION OF INJURY' 'REPORTED, NOT EVIDENT' 'NONINCAPACITATING INJURY' 'INCAPACITATING INJURY' FATAL' Percentage Injury Severity Mar 1 - Mar 7 Mar 8 - Mar 14 Mar 15 - Mar 21 Mar 22 - Mar 28 Mar 29 - Apr 4 Apr 5 - Apr 11 Apr 12 - Apr 18 Apr 19 - Apr 25

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AVAILABLE DATA FROM THE CITY OF CHICAGO

Crash Data: https://data.cityofchicago.org/Transportation/Traffic-Crashes-Crashes/85ca-t3if (Updated Regularly) Chicago Congestion Estimates: https://data.cityofchicago.org/Transportation/Chicago-Traffic-Tracker-Congestion-Estimates- by-Se/n4j6-wkkf (Uses CTA GPS data to estimated link speeds on city network every couple seconds/minutes, updated regularly) Red Light traffic violations: https://data.cityofchicago.org/Transportation/Red-Light-Camera-Violations/spqx-js37 (last updated March 24) Speed Camera Violations: https://data.cityofchicago.org/Transportation/Speed-Camera-Violations/hhkd-xvj4 (last updated March 24) Chicago Taxi Data: https://data.cityofchicago.org/Transportation/Taxi-Trips/wrvz-psew (last updated Dec 31, 2019) Chicago Divvy Bikes data: https://divvy-tripdata.s3.amazonaws.com/index.html (last updated Dec 31 2020) L Entry data: https://data.cityofchicago.org/Transportation/CTA-Ridership-L-Station-Entries-Daily-Totals/5neh-572f (last updated Dec 31, 2019) CTA ridership info: https://data.cityofchicago.org/Transportation/CTA-List-of-CTA-Datasets/pnau-cf66 (last update Dec 31, 2019)

Note: Data in red is where updated information is available for the month of March/April