Periodically query the Google Directions API for certain routes, and then show the estimated duration over the past 24 hours as a list and a graph.
https://www.brewingcode.net/trip-track/
Use cron to do the "periodically" part.
# for local dev: no API fetching, but still builds .html under nodemon
npm start
# fetch from API, and build .html
npm run build
Use the example config file as a starting point.