A method comprising: detecting that a wearable computing device is located within a moving vehicle, wherein the wearable computing device is a watch or computerized glove and is worn by a user; detecting, by the wearable computing device, an indication of movement associated with the wearable computing device, wherein the indication of movement comprises relative changes in elevation of the wearable computing device and detecting the relative changes in elevation of the wearable computing device comprises: determining, by the wearable computing device and based at least in part on a sensor of the wearable computing device, sensor information indicating a barometric pressure of the wearable computing device; and defining, based on the sensor information, the relative changes in elevation; determining that the relative changes in elevation indicate the user is moving their hand up and down in a way that is consistent with a pattern of movement associated with steering a steering wheel or moving a gear shift; determining, based at least in part on the indication of movement, that the user of the wearable computing device is currently driving the moving vehicle by at least: determining a probability that the user of the wearable computing device is performing an act of driving; and responsive to determining that the probability satisfies a probability threshold, determining that the user is currently driving the moving vehicle; and performing, based on the determination that the user of the wearable computing device is currently driving the moving vehicle, an operation. detecting that a wearable computing device is located within a moving vehicle, wherein the wearable computing device is a watch or computerized glove and is worn by a user; detecting, by the wearable computing device, an indication of movement associated with the wearable computing device, wherein the indication of movement comprises relative changes in elevation of the wearable computing device and detecting the relative changes in elevation of the wearable computing device comprises: determining, by the wearable computing device and based at least in part on a sensor of the wearable computing device, sensor information indicating a barometric pressure of the wearable computing device; and defining, based on the sensor information, the relative changes in elevation; determining that the relative changes in elevation indicate the user is moving their hand up and down in a way that is consistent with a pattern of movement associated with steering a steering wheel or moving a gear shift; determining, by the wearable computing device and based at least in part on a sensor of the wearable computing device, sensor information indicating a barometric pressure of the wearable computing device; and defining, based on the sensor information, the relative changes in elevation; determining that the relative changes in elevation indicate the user is moving their hand up and down in a way that is consistent with a pattern of movement associated with steering a steering wheel or moving a gear shift; determining, based at least in part on the indication of movement, that the user of the wearable computing device is currently driving the moving vehicle by at least: determining a probability that the user of the wearable computing device is performing an act of driving; and responsive to determining that the probability satisfies a probability threshold, determining that the user is currently driving the moving vehicle; and determining a probability that the user of the wearable computing device is performing an act of driving; and responsive to determining that the probability satisfies a probability threshold, determining that the user is currently driving the moving vehicle; and performing, based on the determination that the user of the wearable computing device is currently driving the moving vehicle, an operation.