Road works do not include airports.
Answer 3 is incorrect because there is an airport.
Roads, parking places, parking on roads, signal lights, road signs, road markings, marker posts.
Barriers, traffic islands, medians, kilometer columns, walls, embankments, drainage systems, vehicle tonnage inspection stations, toll stations and other ancillary works and equipment.
Roads, places to stop and park cars in areas of railway stations, airports.