Table 4.

Capture-recapture models estimating missing crashes

Model	Variables included	Estimate	SE	AIC	AIC weight	Weighted estimate	Unconditional SE
All crashes
1	ACC NMDS CAS	5.23	0.22	84.87	0.00000003	0.00000014	0.00000001
2	ACC NMDS CAS ACC*NMDS	5.75	0.37	84.48	0.00000003	0.00000019	0.00000001
3	ACC NMDS CAS ACC*CAS	5.06	0.27	85.32	0.00000002	0.00000011	0.00000001
4	ACC NMDS CAS NMDS*CAS	5.33	0.22	54.87	0.09009773	0.48066236	0.03346642
5	ACC NMDS CAS ACC*NMDS NMDS*CAS	6.32	0.41	50.37	0.85614943	5.40872405	0.07995839
6	ACC NMDS CAS ACC*CAS NMDS*CAS	5.19	0.27	55.90	0.05375276	0.27913806	0.02753761
Model-averaged estimate						6.17
Unconditional SE							0.14
On-road crashes
1	ACC NMDS CAS	4.61	0.24	75.99	0.0000010926	0.0000050416	0.0000005142
2	ACC NMDS CAS ACC*NMDS	5.15	0.37	75.19	0.0000016262	0.0000083754	0.0000002457
3	ACC NMDS CAS ACC*CAS	4.38	0.32	76.40	0.0000008888	0.0000038942	0.0000006566
4	ACC NMDS CAS NMDS*CAS	4.74	0.25	53.42	0.0870396250	0.4128898692	0.0311739533
5	ACC NMDS CAS ACC*NMDS NMDS*CAS	5.69	0.41	48.83	0.8633010530	4.9139959238	0.0796703971
6	ACC NMDS CAS ACC*CAS NMDS*CAS	4.56	0.33	54.54	0.0496557143	0.2264598505	0.0271116407
Model-averaged estimate						5.55
Unconditional SE							0.14
Collisions with a motor vehicle
1	ACC NMDS CAS	2.45	0.36	60.47	0.0002105079	0.000514923	0.0000677993
2	ACC NMDS CAS ACC*NMDS	2.75	0.43	61.24	0.0001433835	0.000393918	0.0000255905
3	ACC NMDS CAS ACC*CAS	2.40	0.62	62.46	0.0000777519	0.000186721	0.0000374729
4	ACC NMDS CAS NMDS*CAS	2.78	0.37	45.81	0.3216029517	0.895471259	0.0453152851
5	ACC NMDS CAS ACC*NMDS NMDS*CAS	3.33	0.47	44.94	0.4970883194	1.656397698	0.0609100608
6	ACC NMDS CAS ACC*CAS NMDS*CAS	3.37	0.70	46.96	0.1808770856	0.609953708	0.0483519920
Model-averaged estimate						3.18
Unconditional SE							0.15

SE, Standard Error.