zzzev / traffic

California traffic accident data visualization

California Traffic Accident Visualization

A simple 24x7 chart of traffic accident data from California, from 2003-2012.

Data sourced from SWITRS

Created by Zev Youra

To create csv, run the following commands in a sqlite3 command line session in a directory with the data from the above SWITRS link: .mode csv

.import collisions_2003to2012.csv collisions

.headers on
.output csv

SELECT 
    CAST(TIME_ AS INTEGER) / 100 AS HOUR, 
    DAYWEEK, 
    COUNT(*) AS TOTAL, 
    SUM(CAST(ETOH == 'Y' AS INTEGER)) AS ALCOHOLRELATED,
    SUM(CAST(CRASHSEV == 1 AS INTEGER)) AS FATAL,
    SUM(CAST(PEDCOL == 'Y' AS INTEGER)) AS PEDESTRIAN,
    SUM(CAST(BICCOL == 'Y' AS INTEGER)) AS BICYCLE,
    SUM(CAST(MCCOL == 'Y' AS INTEGER)) AS MOTORCYCLE,
    SUM(CAST(VIOLCAT == 24 AS INTEGER)) AS SLEEP,
    SUM(CAST(HITRUN != 'N' AS INTEGER)) AS HITANDRUN
FROM collisions WHERE HOUR != 25 GROUP BY 1, 2;