A flagger station is set just beyond a crest vertical curve, so approaching drivers cannot see the paddle in time, and the flagger has no clear escape path. What is the best response?

1. Keep the flagger in place but add more cones around them
2. Relocate the flagger and advance warning so drivers have sight distance and the flagger has an escape path
3. Have the flagger stand in the center of the lane for better visibility
4. Replace the flagger with hand signals from the foreman