Systems and methods for identifying distracted driving events using semi-supervised clustering

A computer-implemented method for identifying distracted driving events using a distracted driving analysis system including one or more processors, the method comprising:

• determining, using a trained model, a cluster of at least two clusters that applies to new driving event data indicative of a new driving event by inputting features of the new driving event data into the trained model, wherein the features comprise a phone touch rate and a sudden braking amount, wherein the trained model is trained using a plurality of historical driving event records, wherein the new driving event data is obtained by sensors comprising an accelerometer, a gyroscope, and a magnetometer, and wherein the new driving event data is encoded as multi-dimensional coordinates each comprising a respective dimension for each of the sensors and a respective dimension for time,
• wherein each first historical driving event record of a first portion of the plurality of historical driving event records is labeled with a respective label as an actual distracted driving event or a passenger event;
• wherein the first portion and a second portion of the plurality of historical driving event records are divided into the at least two clusters based at least in part upon common features of the plurality of historical driving event records and the respective labels by processing the first portion and the second portion of the plurality of historical driving event records with a semi-supervised machine learning algorithm, wherein the semi-supervised machine learning algorithm is trained by (i) applying a K-means clustering algorithm to both the first portion and the second portion to identify natural groupings based on features comprising correlations between sudden braking events and phone touches, (ii) propagating the respective labels for the first portion to guide the clustering of the second portion, (iii) assigning confidence scores to cluster assignments for unlabeled data points in the second portion based on labeled data points in the first portion, (iv) automatically qualifying cluster assignments when the confidence scores exceed a predetermined threshold, and (v) manually qualifying the cluster assignments when the cluster assignments are not automatically qualified;
• wherein the trained model is generated based at least in part upon the at least two clusters including cluster labels;
• and
• wherein the common features of the plurality of historical driving event records comprise a respective phone touch rate and a respective sudden braking amount;
• determining whether the new driving event is an actual distracted driving event based on the cluster;
• and
• updating a driver profile for a user based on determining that the new driving event is the actual distracted driving event.

A non-transitory computer-readable storage medium having computer-executable instructions embodied thereon, wherein when executed by a distracted driving analysis system including one or more processors, the computer-executable instructions cause the one or more processors to perform operations comprising:

• determining, using a trained model, a cluster of at least two clusters that applies to new driving event data indicative of a new driving event by inputting features of the new driving event data into the trained model, wherein the features comprise a phone touch rate and a sudden braking amount, wherein the trained model is trained using a plurality of historical driving event records, wherein the new driving event data is obtained by sensors comprising an accelerometer, a gyroscope, and a magnetometer, and wherein the new driving event data is encoded as multi-dimensional coordinates each comprising a respective dimension for each of the sensors and a respective dimension for time,
• wherein each first historical driving event record of a first portion of the plurality of historical driving event records is labeled with a respective label as an actual distracted driving event or a passenger event;
• wherein the first portion and a second portion of the plurality of historical driving event records are divided into the at least two clusters based at least in part upon common features of the plurality of historical driving event records and the respective labels by processing the first portion and the second portion of the plurality of historical driving event records with a semi-supervised machine learning algorithm, wherein the semi-supervised machine learning algorithm is trained by (i) applying a K-means clustering algorithm to both the first portion and the second portion to identify natural groupings based on features comprising correlations between sudden braking events and phone touches, (ii) propagating the respective labels for the first portion to guide the clustering of the second portion, (iii) assigning confidence scores to cluster assignments for unlabeled data points in the second portion based on labeled data points in the first portion, (iv) automatically qualifying cluster assignments when the confidence scores exceed a predetermined threshold, and (v) manually qualifying the cluster assignments when the cluster assignments are not automatically qualified;
• wherein the trained model is generated based at least in part upon the at least two clusters including cluster labels;
• and
• wherein the common features of the plurality of historical driving event records comprise a respective phone touch rate and a respective sudden braking amount;
• determining whether the new driving event is an actual distracted driving event based on the cluster;
• and
• updating a driver profile for a user based on determining that the new driving event is the actual distracted driving event.