Running a commercial fleet in Arkansas requires strict adherence to federal DOT drug testing regulations. With potential consequences for non-compliance, understanding who is covered, what substances are tested, and the five critical testing situations is essential for every employer. From pre-employment screenings to post-accident tests, this comprehensive guide will equip you with the knowledge to build a robust drug testing program that withstands audits. Don’t leave your compliance to chance—discover how Express Mobile Diagnostics can streamline your testing process and keep your operations running smoothly. Read on to ensure your business meets all DOT requirements!