Table 2.

Distribution of traffic exposure for pregnancies in the Cape Cod Family Health Study.

	Shortest Euclidean Distance Between Residence and the Closest Major Roadway (m)			Length of Major Roadways within 500 m Buffer Around Residence (m)			Length of Major Roadways within 200 m Buffer Around Residence (m)
	A1–A3 Roads	A1–A2 Roads	A1 Roads	A1–A3 Roads	A1–A2 Roads	A1 Roads	A1–A3 Roads	A1–A2 Roads	A1 Roads
Minimum	12	13	67	0	0	0	0	0	0
5th percentile	30	68	565	0	0	0	0	0	0
10th percentile	38	136	911	0	0	0	0	0	0
25th percentile	85	339	2075	592	0	0	0	0	0
Median	188	728	3694	1008	16	0	120	0	0
75th percentile	362	1541	5276	1571	658	0	373	94	0
90th percentile	570	2136	7310	2000	1771	0	411	335	0
95th percentile	743	2524	8372	2307	2686	0	555	527	0
Maximum	1923	5306	37,192	3989	11,836	1463	1087	2721	423