Automatic flagging feature for activities with suspicious data/wrong type selected

It would be nice if Strava would automatically flag or provisionally mark rides as private when there are speeds that are highly suspicious, such as >50mph on a flat or uphill. Perhaps post a warning after the ride has been posted and point the user to the crop feature. It's pretty annoying to constantly have to flag segments when you have the KOM due to people accidentally leaving their logging on after finishing a ride...

 

Heavy is the head that wears the crown, I guess.

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Comments

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  • Can Strava developers not come up with some kind of algorithm that automatically issues a soft flag on activities that clearly appear to be in a vehicle and prompt the user to verify or crop the activity? I suspect a lot of people don't know about cropping or don't realize that they uploaded data that included activity once they were back in their car. It would seem simple enough to generate some kind of prompt when the beginning or end of a ride includes speeds well in excess of the rest of the ride or a string of unusually high rankings on the leaderboards at the beginning or end of a ride. I suspect this would improve the quality of the data greatly by keeping honest people honest.

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  • I wholeheartedly agree with Donald, above, that the quality of the data would be greatly improved by having developers figure out a way to automatically flag runs that reach 60 mph over a certain distance, or something to that effect. There are lots of segments near roads that are just cluttered with obvious vehicle activity when people forget to stop their devices. Thanks, Strava-folk, for considering such an improvement!

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  • I notice most of the segments that get flagged are for riders whose only data is speed and time - usually using the app on a smart phone. It is much less likely you will flag a rider who also has heart rate, cadence, power meter etc.

    It makes a lot of sense to restrict the top rungs of leaderboards to riders who have at least three forms of data - i.e. speed, time plus one other. If you haven't got any other data input, then you don't deserve to pollute the leaderboards with potentially fictional rides. 

    I think riders who are using the smart phone app and nothing else should be excluded from (or greyed out in) the top 10. Maybe create an icon to acknowledge these efforts, but they shouldn't get a gold cup or KOM crown when the data is so unreliable.  Anyone can download the app and jump in a car just to play with the thing and have no intention of treating the experience seriously.  I know a lot of people with heart rate and cadence forget to turn off their gamins, but in those cases it is immediately and unambiguously apparent that there is mistaken vehicle use occurring.

     

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  • I was just looking through some segments from a run and every single one had 4 or 5 bike rides at the top of the leaderboards. One was even an international flight. 

    It would be trivial to filter out anything with 2 minute miles as "not a run".

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  • +1

    I would add that another kind of suspicious activity worth automatically flagging are rides/run where all the pace is suspiciously constant.

    I know that this constant pace happens when a user manually enters a run with RunKeeper and then syncs with Strava. If the run contains a segment on a steep hill, the average (constant) pace will be much higher than a real run on that segment.

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  • +1 for an instruction about how to crop on upload of suspicious rides (or soft-flagging)

    Yep, it is a pain having to repeatedly inspect in detail kom-stealing rides to find that most of the time, it's an iPhone or Android device left recording a ride after the rider has got in a car.
    I'd guess Strava already have an algorithm giving a "believability rating" for rides so that flagged rides that breach the threshold are just removed without manual investigation, as no way have Strava the manpower or motivation to investigate them manually. If this is the case, that rating could be used to at least prompt the user that they may want to crop the ride. Usually a stop in location followed by car speeds and a huge step up in leaderboard positions for the rest of the ride.

    Another problem is people riding e-bikes and not being aware that there is another category for that (or 2-minute mile runs etc). This could be handled similarly.

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  • Yes, I 100% agree with this idea. Often one person could wipe a number of riders' leaderboard results just by forgetting to switch off their GPS when getting into their car to head off home. Going around 50km/hr on the flat (especially for women) and uphill is clearly incorrect and there should be a cut off. The user should delete their ride or crop the segment. I have had many QOM's wiped off due to this mistake.

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  • Just flagged a ride, for bad GPS data, where the whole ride had a max of 45kmh, yet a 0.4km segment along the way took a kom at 84kmh. 84kmh on the flat. Come on, this shouldn't require manual intervention, it's obviously nonsense data. Looked like their (phone) GPS only took 3 sample positions over a 90sec period. This would be pretty easily identifiable by software.

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  • And .. just as annoying .. cyclists in running mode. Would be nice if these were automatically flagged when they break world record pace - although this could be a bit unfair on athletes genuinely breaking world records on strava. 

    Seems almost daily I'm getting de-throned by a cyclist clocking a 1:30 kilometre en route.

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  • I am also frequently dethroned by people, mostly women clocking around 70-100km/hour on numerous segments on the bike route because they forget to turn off their GPS's before driving off in their vehicles! So very annoying! Can't these rides be automatically flagged and a message sent to these forgetful people to delete their rides as it has ruined the entire leaderboard.

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  • Frequent offenders is another pattern I've noticed, especially on the same segments. Some suggested weighting factors for auto-flagging rides (just indicators to be taken collectively):
    * Frequent offender
    * GPS device being non-bike-attached (only seen an Edge device left on in a car once)
    * World record pace
    * Very lower heart rate up a climb c/w other slower and flatter sections, 
    * Parking in the middle of a car park,
    * Cycling along a railway line or motorway at high speed,
    * Step up to kom-taking pace after a mid-ride stationary time period (getting into a car)
    * Koms (esp at the end of a ride) from someone who previously has achieved no koms ever,
    * Rides that include crossing a sea.
    If Strava are monetising their collected *cycle* data, don't they have a responsibility to maintain integrity of it?
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  • YES PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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  • What's up, Strava? You going to do anything about the stealing of K/QOM's? I see segments where there are 20 or more obviously bogus times. What do I do, flag all of them? Why can't you step up and make this happen. What did I pay you money for? At the VERY least there should be a way to mass report a segment to you for investigation for all posted ride times, not just the K/QOM's.

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  • +1  I have noticed a big increase in the amount of activities done in a bus and or car for allot of cape town.  why does strava still allow them to rule all the KOMS/QOMS 

    every now and then i check the KOM for a segment and 9 times out of ten it's a vehicle doing 70 to 80km on a flat road or hill. Why do you allow this strava..   

     

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  • I also agree that automatic flagging would be great. I see quite a lot of wrong activity types on the leaderboards where I live. Most of them are rides and Nordic skiing that are registered as runs. Most of the wrong ones have speeds (downhill) that would leave any Olympic champion in the dust. So it should be pretty easy to single out. 

    Some of the leaderboards are swamped with wrong activities. Especially Nordic skiing seems to be confused with running a lot.  

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  • I've noticed this a lot. Running times which are clearly by cyclists uploaded as runs (whether due to default activity or some other fault) and being minutes ahead of WR pace for about ten times the distance... This isn't a rare occurrence and is disheartening that nothing is being done. Several other stat tracking sites have very basic algorithms to automatically veto efforts which are extremely suspicious.

     

    I strongly back a similar idea for all activity types.

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  • Any news on this? I can see some updates have been rolled out for new activities with world record breaking times but this doesn't take care of historical data

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  • +1 100% this - there are so many segments within my area that have cyclists at the top of the leaderboards. Surely Strava, as an analytics company, could come up with some sort of flag that auto-raises if a runner is within 10% of WRs?

    I have a guy today take a CR by 30s, and only the way nearly broke WRs in 400, 2miles, 5k and 10k 😂

    Come on Strava, if you're moving leaderboards behind a paywall (which I gladly will continue to pay for) this has to be better.

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