Live traffic overlay
Grand Central Pkwy Approach
free slow stopped
How this dashboard tracks traffic.The map above renders Google's live traffic overlay for the terminal-access corridor and refreshes continuously — suitable for a wall display in an operations center. To operate within Google's free tier, numeric travel-time samples are recorded only during this route's designated peak windows (06:30–08:30 & 16:00–18:00 local), when congestion materially affects arrival times. Outside peak windows the chart below reflects Google's forecast curve. The map overlay remains live at all times.
Today's outlook
2 congestion windows today
Elevated00:00–05:15peak 02:30 ≈ 3.8 minNow
Tracking in real time — recording actuals every 15 minutes.
Heavy05:45–23:45peak 10:00 ≈ 4.5 min
Forecast accuracy · Google model
How well the prediction has matched reality
Score = 100 − mean absolute percentage error over paired forecast/actual samples inside peak windows. Higher is better.
Last 7 days
81.6%
MAE 0.7 min · 59% within ±20%
101 paired samples
Last 30 days
81.6%
MAE 0.7 min · 59% within ±20%
101 paired samples
Travel time
24-hour day view
Thu Aug 6
Peak windowForecast (Google)Forecast (Internal Model)· soonActualLast week
How this dashboard learns.Every travel-time sample is compared against the Google forecast for the same route, date, and 15-minute slot. Over time, this builds a route-specific model of when the forecast tends to under-call or over-call congestion for each terminal-access corridor. That model layers in day-of-week patterns, seasonal demand shifts, and the historical gap between predicted and observed peak windows to refine the next prediction into a baseline that is tailored to this airport. The result is a forecast that becomes sharper for each route as more data is collected.