Union County Agency Transportation Service (UCATS) Share: GovernmentHealthcareTransporation Services Union County Agency Transportation Service (UCATS) Visit Website 940 London Ave Suite 1800 Marysville, OH 43040 (937) 642-5100 (937) 644-8700 (fax) http://www.co.union.oh.us/UCATS/ Hours: Monday thru Friday 8:00 am to 4:30 pm About Map About Transportation services for Union County. Directions State Route 4 North. Turn right into the drive after County Home Road. There will be a sign for Union County Agricultural Center.