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Roundabout envelope, Sydney: is a human driving envelope calibrated on held-out entries?

Roundabout envelope, Sydney
MeasuredLiDAR tracksModelledconformal bandRendered
Calibrated, not specific

Held out by recording hours, the envelope and the whole-path band both landed in the 93 to 97 % target at 6 of 6 strata. The straight-on envelope also covered 80.9 to 96.4 % of turning cars (target 80 % or less), so it is not specific.

This is Australian left-hand traffic used as a method check, not a UK result.

28 of 178 entries in block 5 (24 Jan 2018, 18:13 to 20:57) left the band, drawn orange where they leave it; block coverage 84.3 % (95 % CI 78.2 to 88.9).

Orchard-Mitchell A, leftMODELLED
93.4 % (95 % CI 91.6 to 94.8)
Whole-path band, held out by hours: 892 entries, target 93 to 97 %.

Limits: slower entries only (10,589 of 22,196 cars left out); four of five roundabouts recorded on one day. More behind Method.

Where road users droveTwo arms not recorded: not assessed
Method sheet

Five Roundabouts dataset, Alex Zyner and Stewart Worrall, The University of Sydney, 2019, CC BY 4.0 (doi:10.25910/5c64b8b7dba5b) | Cleaned, resampled, analysed and rendered by MapMap