[portman]

I suspect they have already started to do so.

<anecdote>

Every morning I drive in the HOV lane of the 101. Waze and Google Maps give me traffic-based ETAs that are about 20 minutes longer than Tesla's. And every morning, Tesla wins. (And since I am a dork I continue to pit the 3 apps in this lopsided battle.)

The 20 minute delta is precisely the difference between the HOV and non-HOV lanes. My guess is that the Tesla traffic estimator is using telemetry from other cars on the road, which are also using the HOV lanes like me.

</anecdote>

This is purely speculative, but the technology certainly exists that would allow Telsa to do this.