Determine what California's Title 8 Section 1599 actually requires for flagger training -- and distinguish it from the 4-hour/80%-passing-score figures quoted by private training providers -- before booking a course for Caltrans or California state right-of-way work.

Steps

1. Read the live text of 8 CCR Section 1599 at dir.ca.gov/title8/1599.html: it requires flaggers to be trained in the fundamentals of flagging moving traffic before assignment, by a person with the qualifications and experience necessary to effectively instruct, with signaling directions conforming to the California MUTCD -- the regulation itself specifies NO minimum training-hours figure and NO passing-score percentage
2. Treat any "4-hour" course-length or "80% passing score" figure as a training-provider course specification (e.g., Caltrans-authorized vendors' own curricula), not a Section 1599 regulatory requirement, and attribute it explicitly to the provider/course rather than to the regulation when citing it
3. Confirm whether the job is on Caltrans/state right-of-way, which requires a Caltrans-authorized course listed at dot.ca.gov/programs/construction/safety-traffic/safety-training-courses, versus a city/county road where local certification may suffice but does not carry over to state right-of-way
4. Verify with the chosen provider whether their course is delivered in-person or online, and separately confirm Caltrans' own authorization practice for the course -- this in-person expectation is a provider/Caltrans-authorization practice, not Section 1599 statutory text
5. Check 8 CCR Section 1598 (Traffic Control for Public Streets and Highways) alongside Section 1599, since Section 1599 incorporates the California MUTCD by reference for flagger placement and signaling