Leave Time Optimizer

Setup required. Open this file in a text editor and paste your Google Maps API key into the API_KEY variable near the top. You also need these 4 APIs enabled in Google Cloud Console:

Routes API, for traffic-aware forecasts
Maps JavaScript API, loads the map
Places API (the classic one, not "New"), address autocomplete
Directions API, draws the route on the map

Route & Timing

Origin

Destination

Date

Arrive by

Buffer

Mode

Relaxed

If traffic is light

Usual

Typical traffic

Important

If traffic is heavy

by Jeremy Lee, 2026

Ready when you are.

Fill in the route and timing on the left, then start monitoring.

Leave at exactly the right time.