City Speed Check Sign Traffic Data Aggregated by 15-Minute Intervals

Edmonton's Speed Check Signs collect vehicle speed data in 15-minute intervals, reporting counts and percentages for vehicles in specific speed bins relative to the limit. The aggregated dataset begins on January 1, 2019 and is maintained by the City of Edmonton via data.edmonton.ca.

Use Cases

• Analyze temporal speeding trends using 'Vehicle Count in Time Interval' and speed over-limit columns like 'LO Over Limit Percent'.
• Model neighborhood-level speed compliance by joining 'Neighbourhood Boundaries : 2019' with aggregated 'HI At or Under Limit Count'.
• Assess the effectiveness of specific sign locations by correlating 'Roadway Maintenance Area Polygon' data with 'HI 31+ Over Count' for severe speeding incidents.
• Forecast traffic volume patterns using the 'Vehicle Count in Time Interval' column across different times of day.

Strengths

• Data collection starts January 1, 2019, providing a multi-year temporal series.
• Speed data is disaggregated into 10 bins (Bin 1 to Bin 10) with separate counts for highest and slowest detected speeds per vehicle.
• Reports are aggregated at a consistent 15-minute interval granularity.

Limitations

• Sample size and total row count are unknown, limiting assessment of statistical power.
• Device parameters are programmable and may vary by location or schedule, potentially affecting data consistency.
• Each radar unit tracks only the strongest signal, capturing one vehicle at a time, which may undercount dense traffic.

Provenance

Source

City of Edmonton via data.edmonton.ca.

Collection Method

Data extracted from individual Speed Check Sign (radar) units, aggregated from compliant datasets based on defined speed range criteria.

Time Range

From January -01, 2019 onward.

Freshness

Data is updated regularly, with a last recorded update on March 31, 2026.

Geography

City of Edmonton, Alberta, Canada.