Patent 10229598 was granted and assigned to BlackBerry on March, 2019 by the United States Patent and Trademark Office.
A method at a portable sensor apparatus for detecting an approaching vehicle, the method including detecting, using at least one detector at the sensor apparatus, signal energy of a signal from the approaching vehicle; analyzing the signal energy using a processor at the sensor apparatus to determine that an alarm should be triggered; and based on the analyzing, causing the alarm from an alert mechanism on the sensor apparatus.