Every metro region in America, ranked.
Metropolitan Planning Organizations are the federally designated planning bodies for metro areas. This leaderboard compares signal performance inside those boundaries: delay, peak-hour reliability, arrival on green, and sampling density.
Smoothest 10 MPOs
Lowest signal-weighted average control delay.Top 10 MPOs with the lowest signal progression
Lowest arrival-on-green percentage.National MPO leaderboard
Filter by MPO name or lead state. Click any header to sort.| # | MPO | State | Signals | LOS | Avg delay | Peak-hour LOS | AOG % | Daily obs / signal |
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About these metrics
All figures are derived from INRIX Signal Analytics: anonymized GPS pings from connected vehicles passing through signalized intersections, sampled across eight representative weeks of 2025. They are probe-based performance measures, not full traffic volumes. Full definitions, the data window, and Level of Service thresholds are documented on the methodology page.
Peak hours are rolling 60-minute windows stepped every 15 minutes. For each intersection we evaluate weekday AM, weekday PM, and weekend candidate windows separately and select the window with the highest average control delay as that intersection's peak. State composition aggregates those per-intersection peaks; the "typical" window cited in each caption is the modal window across states.