The user may select which route to take based on the distance or estimated time. However, the estimated time may be inaccurate due to traffic conditions that may not be known and/or included in the time estimate. Apple wants to change this.

Here's the summary of the invention: “In some implementations, a mobile device can transmit a request for traffic information to a server. The traffic information can include movement information including detected stops and durations of detected stops. The traffic information is analyzed to detect traffic patterns that indicate locations of stop signs and/or stop lights.

"The traffic information is analyzed to determine durations of stops at stop signs and/or stop lights. The durations of stops are associated with a time of day and/or day of the week. In some implementations, navigational routes are determined based stop sign and/or stop light information, including the delays attributable to detected stop signs and/or stop lights.”



