When driving on an expressway at a speed of 110 km/h, the vehicle in front is 80 meters ahead. According to safety regulations, what should the driver do?

1. Maintain current speed because 80 meters is ample space
2. Accelerate to close the gap to 30 meters to draft aerodynamically
3. Decelerate smoothly to expand the following distance to at least 100 meters (保持100米以上安全距离)
4. Flash high beams continuously to order the vehicle ahead to accelerate