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So regarding your previous comment on GPS glitches etc., have a look at this segment I just stumbled across when checking my morning commute:
https://www.doogal.co.uk/StravaSegment.php?id=8419504
1 Giancarlo G. 00:00:03 355.3km/h
2 Don C. 00:00:04 266.5km/h
3 Loïc B. 00:00:06 177.7km/h
4 Emdad R. 00:00:09 118.4km/h
4 Ian W B. 00:00:09 118.4km/h
6 Joey J. 00:00:11 96.9km/h
7 Henrik P. 00:00:12 88.8km/h
8 Darren N. 00:00:13 82km/h
9 Gavin S. 00:00:14 76.1km/h
9 Ashley P. 00:00:14 76.1km/hTo be fair, that's the worst I've seen in a while...
SwissChap-
So regarding your previous comment on GPS glitches etc., have a look at this segment I just stumbled across when checking my morning commute:
https://www.strava.com/segments/8419504
OK, the first one looks like it might be related to Strava's moving time bug that many people have ranted about. It affects running really badly as it trusts some of the data from the device, but not the data that would give a more sensible answer. If there's a hole in the data then it generally picks the wrong data and arrives at the wrong answer.
If you zoom out a bit on the top ride you can see what happens:-
https://www.strava.com/activities/192185063/analysis/6403/6875
No data for a minute and 10 seconds but when the data arrives again it uses the GPS location of the last known location (the South side of the bridge), which is why it ends up jumping the length of the bridge in 3 seconds.
Strava should be better at detecting this and clearing it up.
Greenbank
A lot of my commute (SW15 to SE1) is filled with 60kph people but that's because it follows most of the route of the London Surrey Classic and has had professionals riding it at that speed:-
https://www.strava.com/activities/1742059749/overview
A lot of the other ~57kph segments seem to be people who probably just got lucky with traffic lights and were drafting vehicles. Some of my PBs (still a way off the associated KOMs) on similar segments were gained exactly this way, and they're utterly untouchable by me now.
I don't think much of it is down to GPS glitches, I suspect there's more Digital EPO going on that random GPS problems.
I've also done most of my commuting route at ~4am on a faster bike with minimal luggage, with a tailwind, at the start of a 200km Audax. Again my times here are a lot better than riding my heavy commuter with 15kg of crap in the panniers on the way to work at 8.30am in heavy traffic.