This is a great step in the right direction for making driving safer with mobile devices. However there is one serious flaw in their reasoning - they asserted that 90% of cars have Bluetooth devices in them. That is a gross misinterpretation of the title of the article that they linked to - that said 90% of new cars will have Bluetooth capabilities in them...in 2016. So realistically, you're looking at far less than 90% of cars could implement this strategy immediately, which severely limits the efficacy of Bluetooth-enabled "Car Mode."
A portion of these users could be captured if Apple implemented a Car Mode button similar to Airplane Mode. The demonstrated functionality in this article would be useful for Airplane Mode too, come to think of it, in so much as it it could alert you to the fact that the recipient hasn't been active on iMessage since they turned on Airplane Mode.
True but most people these days have some ways to connect to their phone to stereo.
There might be a better way than Bluetooth.
Using a system based on something like Moves App (https://www.moves-app.com) would automatically detect when the user moving faster than a walking or cycling speed.
Of course, this presents a problem when the user is on public transport however the system could easily 'learn' when this is the case i.e. cross referencing public transport routes with speed of user.
I love the concept. One thing to address is when you are using your phone for navigation. This presents two problems, first applications like Google Maps utilize notifications to deliver turn by turn directions. By with holding all notifications, navigation will fall back on the vehicle's features. Furthermore, I greatly value the ability to see my screen when using Google Maps. The ability to glance and see how far until the next turn is part of navigation. Something that will be lost with Car Mode implemented.
This is pretty cool. I could see it being easily incorporated into the Do Not Disturb mode, rather than creating an all new Car Mode.
However, DND does not currently notify the sender that the recipient has that mode turned on, and that may be because of privacy concerns. Notifying the sender that I am driving implies that I am not at home, or work, etc, which is enough that I probably wouldn't use the feature.