What is the meaning and driver response required when approaching longitudinal or transverse optical deceleration markings (车行道减速标线) painted on the roadway surface?

1. The markings create a visual narrowing effect warning the driver to proactively decelerate before hazardous curves, toll plazas, or ramps
2. The markings indicate that the road surface is undergoing repaving and all vehicles must come to a complete stop
3. The markings designate an exclusive high-speed acceleration corridor where speed must increase by 20 km/h
4. The markings permit heavy trucks to overtake vehicles across solid double yellow lines