Texas's Move Over / Slow Down law requires you to do which of the following when approaching a stopped emergency vehicle or TxDOT vehicle with lights flashing?

1. Maintain your current speed and lane
2. Either move over a lane (when safe) or slow down to 20 mph below the posted limit (5 mph below if the limit is 25 mph or less)
3. Stop completely in the lane next to the emergency vehicle
4. Honk your horn three times and continue