apollo. (2026). US 67 hourly traffic counts south of Marfa, three days in May 2004 (UT Dallas) (Version 1.0) [Data set]. Mysteries Department. https://mysteriesdept.com/datasets/DAT0DCKJJBP0ZXP/us-67-hourly-traffic-counts-south-of-marfa-three-days-in-may