Importance: Saving lives through crowdsourced data.
Details: It would be great to be able to report point locations on our activities where we experienced Near-Miss incidents, and capture the data (including GPS track, speed, heart rate, power, etc) for a 1/8 mile before and 1/8 mile after (to ensure the data was captured and provide data leading up to the near-miss). There have been countless projects devoted to capturing near-misses, (Close Call Database, BikeMaps.org, Cyclist Video Evidence, NoVA FSS) but not to the extent that the Strava user community reaches and none of them include the GPS track data that Strava captures.
This data should be anonymized and provided free of charge to the user community and government agencies, as it can benefit Strava users and society by helping to reduce near-misses and crashes.
The data could also be included in existing Strava products and features like Strava Metro - Allow agencies to create a bounding box where they can get notified of new reports to take action on and create dashboards from, routing - avoid/heavily weigh areas of high reports, and more directly by audibly warning users when they're coming upon a "hot-spot". Additionally Strava could pull in crash data in include it in a similar way.