Abstract: In one implementation, a computer-implemented method includes receiving, at a mobile computing device and after transmitting an order, information that identifies a delivery worker who is handling delivery of the order; continuously updating an interface presented by the mobile computing device until the order has been delivered, the interface identifying a current location of the delivery worker relative to a current location of the mobile computing device as both of the current locations change over time, the continuously updating including: determining, by the mobile computing device, the current location of the mobile computing device; receiving, at the mobile computing device, the current location of the delivery worker; and presenting, by the mobile computing device, the interface depicting the current location of the delivery worker relative to the current location of the mobile computing device.

Abstract: Techniques are described for measuring acceleration of a vehicle with a mobile device. The techniques are applied to detect excessive acceleration events of the vehicle. The techniques are implemented in a mobile device that includes an accelerometer, a global positioning system (GPS) sensor, and a processor configured to identify an excessive acceleration event of a vehicle that the mobile device is located in. The processor is configured to receive, from the accelerometer, a first acceleration data when the vehicle is a rest and a second acceleration data when the vehicle is moving. The processor is also configured to determine, based on the first acceleration data, a gravity vector, and determine, based on the second acceleration data, an acceleration vector for the mobile device.

Abstract: An intersection assistance system includes at least one vehicle sensor and a gap estimator. The vehicle sensor is configured to obtain vehicle information on vehicles approaching the intersection along a main roadway. The gap estimator is configured to estimate gap information relating to a gap between the vehicles based on the vehicle information. The gap information includes a length of the gap, a location of the gap, and a velocity of the gap. In a method of obtaining information for use in assisting a driver of an entering vehicle to safely enter an intersection, vehicle information is obtained on vehicles traveling toward the intersection on a main roadway. Next, gap information is estimated relating to a gap between the vehicles based on the vehicle information. The gap information includes a length of the gap, a location of the gap, and a velocity of the gap.

Abstract: An intersection assistance system includes at least one vehicle sensor and a gap estimator. The vehicle sensor is configured to obtain vehicle information on vehicles approaching the intersection along a main roadway. The gap estimator is configured to estimate gap information relating to a gap between the vehicles based on the vehicle information. The gap information includes a length of the gap, a location of the gap, and a velocity of the gap. In a method of obtaining information for use in assisting a driver of an entering vehicle to safely enter an intersection, vehicle information is obtained on vehicles traveling toward the intersection on a main roadway. Next, gap information is estimated relating to a gap between the vehicles based on the vehicle information. The gap information includes a length of the gap, a location of the gap, and a velocity of the gap.