How every state's signals performed.
A focused cut of the INRIX U.S. Signals Scorecard dataset: every state ranked by average control delay, Level of Service distribution, and observation density. See the methodology for definitions and the sample window.
State leaderboard
Click any column header to sort. Default order: lowest average delay first.| # | State | Signals | LOS | Avg delay | Median delay | % A | % D–F | Daily obs / signal | AOG % | Peak-hour delay | Q4–Q1 Δ |
|---|
Smoothest 10
Lowest average control delay.Greatest opportunity 10
Highest share of intersections at LOS D–F.Most-coordinated states
Top 10 states by arrival-on-green.Level of Service composition by state
Each bar is one state's intersections, split by LOS grade across the full day. Ranked by share of D–F.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.