OregonGal ...speaking of accelerometers - from your post ( see recent article below , and how NUNCHI can assist).

The first phone produced from scratch by Motorola Mobility since being acquired last year by Google is chock-full of cutting-edge features.

http://www.usatoday.com/story/tech/columnist/baig/2013/08/01/motorola-unveils-motox-smartphone/2609349/

The touchless controls take advantage of Google Now. Once turning on the feature during the initial setup and briefly training the phone to your voice — you are asked to say, "OK Google Now" three times, then you are good to go. You can then say things like, "OK Google Now, is it going to rain today?" or "OK Google Now, navigate to the United Nations." If it can't give you a definitive answer, ("OK Google Now, who will start at quarterback for the New York Jets?") you'll get the most relevant Google search results. I'm eager to try the feature out in a noisy environment such as a speeding car with the windows open.

Speaking of the car, the new phone recognizes its environment. So, if you are in a moving vehicle, for example, it can automatically put the phone into a drive mode to — among other things — say aloud the name of the person calling you. Moto X is supposed to also detect when you're no longer in the car and will change the phone's settings accordingly. I plan to put this to test.

The NUNCHI® Technologies in Action: Safety

http://www.ipmetrics.net/teen-driving-rules-enforcement-nunchi-technologies.html

The Nunchi Solution: The teen’s communication device includes sensors, an accelerometer, and GPS radio, as well as optical and acoustic sensors, with which the Nunchi Technology system can detect the situation above by analyzing the current sensor reading (e.g., position change, speed of travel, driving restrictions active) with a norm which allows the system to identify the signature described as {teen driving – limit interruptions}. Upon detecting the signature from the periodic sensor readings variations from the norms of this activity, the system responds to interruptions from different levels of the corresponding hierarchy in a specific manner. For instance, if a text message interruption arrives from the level “friend,” then the system responds with an automatic “I am driving, please do not disturb, will reply later” response and the user is not disturbed with a notification and/or ring tone as long as the driving signature persists. If, however, the interruption comes as a phone call from the level “parent”, then the caller can get an immediate response that states, for example, “Your teen is driving, is this something that can wait?”, if the parent does need to speak with the teen immediately, a second call or further interaction with the system by replying “no” to the automated message, the teen can get a notification through the car’s sound system (via Bluetooth connection) to the effect of “Your parent needs to speak immediately, please find a place to park to answer,” while the system can then call back the parent once the sensor signature has indicated the car is not moving and the teen is ready to talk safely.