Hello HN!<p>I made this as a test of what can be done locally in the browser without a backend, and because I was frustrated with certain things missing from traditional maps.<p>You can draw routes around the tube network, get time heatmaps from any station, use alternate maps, disable lines, etc.<p>It should work in latest Firefox and Chrome desktop, Chrome mobile, and hopefully Safari (though I couldn't test it myself yet). IE definitely doesn't work until I've had more time to play with it, it doesn't support maps/sets without polyfill...<p>I'd really appreciate screenshots from Safari if anyone feels particularly helpful :P