I went through the top 10 major metro areas in the US. Here is what I'm finding regarding flow info:
new york, ny - broken, no interstates show flow, some parkway and sidestreet flow showing
los angeles - can't test, too early to for traffic yet
chicago, il - broken, no highways show flow data, some sidestreet flow showing
dallas, tx - broken, no highways show flow data
philadelphia, pa - brokwn, no highways show flow, some sidestreet flow showing
houston, tx - can't test, too early to for traffic yet
miami, fl - broken, no highways show flow data
atlanta, ga - broken, no highways show flow, some sidestreet flow showing
washington, dc - broken, no highways show flow, some sidestreet flow showing
boston, ma - broken, no highways show flow data
Here's what I think is happenning..
First some background, Tomtom has 3 known traffic input feeds:
1) Inrix - provides flow and incident data, flow used to be limited to interstates, but they expanded a month or two ago to main sidestreets. Prior to this bug, this expanded flow never made it into PLUS devices
2) Trafficcast - also provides flow and incident data. Added to Inrix on the 740 LIVE traffic only, and on routes.tomtom.com. Has provided highway and sidestreet flow since the US 740 launch in April, but doesn't catch as many incidents as Inrix. My suspicion is that trafficcast has more coverage than Inrix, but less fleets providing probe info.
3) Customer probes - 740 and tomtomwork devices transmit their speeds back to Tomtom. 740 LIVE traffic users had this info available to them, uncertain whether PLUS had this info
4) Cell phone probes - This fourth probe type is unavailable in the US. It is where a cell phone company tells Tomtom how fast its phone owners are moving down streets (even when not on a call). This is the most detailed and most accurate traffic info available, with coverage on main roads and many sidestreets. It is available as Tomtom HD traffic in Europe. The only public availability of this data in the US is on google maps, but it doesn't offer turn-by-turn.
So I think one of two things happened:
1) In the past, PLUS only had Inrix feeds. I never saw sidestreet info anywhere in Boston, or anywhere else. It's possible that Tomtom upgraded to include Customer Probes, or upgraded to include the expanded sideroad Inrix, but in the process messed it up. They turned on the sideroad flow (as evident in many cities), but shut down the highway flow by accident. Inrix incidents have always shown, and continue to show during this outage.
2) Perhaps Tomtom shut down Inrix in preparation for HD traffic, terminating their flow contract while keeping the incident contract. There was a rant by the Inrix CEO whining about trafficcast and cell phone probes
here, which could be justified if they were terminated by a leading traffic vendor like Tomtom. Also Tomtom said it is in discussions for US HD traffic on their last financial call, though providing no further specifics. Google uses Verizon phones for its cell traffic data plus any GPS-enabled phones running Google maps. Since Google uses Teleatlas maps, and Verizon is 45% owned by Vodafone (who runs HD traffic in Europe), it's quite possible that the US Tomtom HD Traffic "discussions" involve Google/Verizon/Tomtom.
So Tomtom could have screwed up (first scenario), or could be launching something new (second scenario).
Bottom line is that us PLUS subscribers haven't gotten what we paid for in over a week.