. Author manuscript; available in PMC: 2013 Dec 1.

Published in final edited form as: J Safety Res. 2012 Oct 24;43(5-6):375–380. doi: 10.1016/j.jsr.2012.10.004

Table 1.

Rural-Urban Continuum Codes (RUCC) for NASS-GES and US Counties

		NASS-GES / US Counties	NASS-GES Sample Crashes	NASS-GES Weighted Crashes
RUCC	Definition	n= 77 / N= 3142	n= 401,983	N= 42,680,732

1	Counties in metro areas of 1 million population or more	39 / 414	229,074	20,712,622
2	Counties in metro areas of 250,000 to 1 million population	14 / 325	84,995	9,161,404
3	Counties in metro areas of fewer than 250,000 population	7 / 351	57,404	8,049,412
4	Urban population of 20,000 or more, adjacent to a metro area	6 / 218	22,731	3,228,408
5	Urban population of 20,000 or more, not adjacent to a metro area	0 / 105	0	0
6	Urban population of 2,500 to 19,999, adjacent to a metro area	3 / 609	2,107	338,113
7	Urban population of 2,500 to 19,999, not adjacent to a metro area	5 / 450	2,744	588,630
8	Completely rural or less than 2,500 urban population, adjacent to a metro area	2 / 235	516	66,004
9	Completely rural or less than 2,500 urban population, not adjacent to a metro area	1 / 435	2,412	536,139