Data Sources | Source Type | Frequency | Description |
---|---|---|---|
Twitter [11] | Live text | Live. Query every 5 min | Decahose – Geo-tagged tweets within Chicago city limits |
Travel Mid-west [12] | Various | Traffic camera images every 15 min Vehicle Detection System (VDS) every 10 min Dynamic Message Sign (DMS) every 10 min Thousands of camera locations | Traffic Cameras VDS—Vehicle Speeds, Vehicle Occupancy DMS – Traffic times, Lane Closures, Accidents |
City of Chicago [13] | Various | Traffic Segments every 10–15 min Traffic Region every 10–20 min Construction Moratorium—Infrequent | Traffic Segments – Vehicle Speeds, Vehicle Occupancy Traffic Region—Vehicle Speeds, Vehicle Occupancy Construction Moratorium – Road closures |
GDELT [14] | Various | Every 15 min | Global Knowledge Graph – provides context and feeling between people, organizations, and locations Event Mentions, Events |
MapQuest [15] | Various | Every 5Â min | Reported Incidents |
Digital Globe [16] | Satellite Imagery | 1–3 images a day | Satellite Imagery (limited number of images) |
Dash Camera | 3-h Video | Field experiment | Dash Camera Video (Live Experiment and Validation) |