Table 2

MAE, RMSE and ICC for agreement with actual driving time

Cost-friction surfaceOSRMGoogle Maps
nMAERMSEICCMAERMSEICCMAERMSEICC
Total3855364−0.344657−0.1914210.85
Period of day
 Weekend—morning315060−0.394454−0.2519270.66
 Weekend—afternoon135360−0.514754−0.3713150.87
 Weekend—evening123144−0.0525380.18590.98
 Weekend—night102124−0.381319−0.07230.98
 Weekday—morning695059−0.294452−0.1813170.91
 Weekday—afternoon335772−0.375166−0.2414190.84
 Weekday—evening425564−0.294958−0.1316200.83
 Weekday—night196176−0.2454680.0417270.89
 Could not tell1565663−0.444956−0.2814200.81
Referral status
 Referred1326878−0.276171−0.3616210.86
 Not referred2534555−0.483949−0.0913200.82
Driving time of replicated journey (min)
 <30921315−0.48911−0.12450.78
 30–601314142−0.913536−0.8611130.21
 60–1201327577−0.856769−0.8019250.45
 >12030131135−0.88120124−0.8537440.31
Google Maps driving distance estimate (km)
 <5911823−0.371521−0.207110.60
 5–10934145−0.733539−0.6413170.42
 10–201015659−0.794952−0.7315210.38
 >201009499−0.778491−0.7821280.63
  • ICC, intraclass correlation coefficient; MAE, mean absolute error; OSRM, Open Source Routing Machine; RMSE, root mean square error.