Click a freeway on the map
Through the day
Typical speed over 24 hours (or a whole week). Click the graph to set the map time.
This time of week, over the years
Week at a glance
Every day & hour for the selected years. Click a cell to jump the map there.
Click a freeway on the map
Where & when congestion forms
Distance along the freeway (vertical) against time of day (horizontal) for the selected day and years. Slow zones growing and shrinking are bottlenecks and their queues.
Hours of congestion, over time
Best time to leave
Pick two points on the same freeway: click the map for the start (A), then press “Pick B” and click the end.
A: — B: —
Commute asymmetry
For every freeway location, how much slower than free-flow is each direction in the morning (12a–12p) and in the evening (12p–12a)? That slow-down is the "area above the curve" (mph·hours) on the Point graph. The map recolors each location by how lopsided the two directions are. Uses the selected day(s) and years; the time slider doesn't matter here.
Click a freeway on the map
Most lopsided spots
Click one to go there. (One per stretch of freeway.)
Compare with another year
Pick a year to compare the selected years against. The map then shows the change in speed at the chosen day and time (green = faster now, red = slower), and the other graphs add a dashed line for the comparison year. Choose “nothing” to switch it off.
Share of freeway that is congested
Region through the day
Share of all sensors below the congestion threshold for the selected day (threshold set on the Corridor tab).
Slowest spots right now
At the map’s selected day & time (one per freeway direction).