Safe driving automatic responder
A contextual responder that interacts with pre-determined groups (for instance, Facebook groups, or a group list on a phone) to determine the privacy level (how much information is shared) to automatically reply to a phone call, SMS, or any other means of communication during times of a need of high-concentration levels for the duration of a specific task.
For instance, when driving, one of a person's best friends calls them on their mobile/cellular phone, and the person is driving. The automatic responder can let the best friend know when the person will be available to respond.
The app on the phone can then detect via location (GPS) services when there is a period of time of non-inertia (for instance, detecting stop-lights, and also detecting approximately how long the non-inertia period of time will be according to stop-light sequence) to alert the driver when a message has been received without interrupting the driver.
Depending on the level of privacy set for each group or individual, an automated reply can be set explaining such known details as anything from the current location and time to reach destination, to a rounded up time to reach destination, to even simply a 'not available' reply.
A simple sound can alert the driver when someone has been trying to contact the driver during a period of time when less concentration is required (for instance, not while traversing a corner or turn, but rather on a straight leg of road with a safe distance between surrounding cars) so that the driver will know a message is waiting or even supply a voice command to the phone to determine if an automated reply should be sent at all.
The apps could interact on the cloud, or for people who prefer their privacy to be more isolated, could work on only localised information with minimal or no automation.
I have read about and even witnessed people talking on their mobile phone or even SMSing while driving. I believe this type of idea would save lives in many situations.