_id	ID	HH_ID	HH_WEIGHT	HH_GEO_ACC	H_STATE	H_COUNTY	H_CPA	H_MCD	H_TRACT	H_TAZ	A_TYPE	HH_TOT_TRIPS	HH_MO_TRIPS	HH_NM_TRIPS	GPS_Factor	F_HH_TOT_TRIPS	F_HH_MO_TRIPS	F_HH_NM_TRIPS	HH_SIZE	HH_WORK	TOT_VEH	OP_VEH	VEH_OUT	TOT_BIKE	TOLL_ACCNT	CAR_SHARE	RES_TYPE	INCOME	TRAV_DATE	TRAV_DOW	HOLIDAY	HOL_TYPE	OV_SAMPLE	STUDY	RECRUIT	RETRIEVE	R_LANG	SURV_LANG