1. A method comprising: identifying a first construction object associated with a construction zone; mapping an area of the construction zone based on the identified construction object; classifying, by a processor, an activity type of the construction zone based on characteristics of the construction zone, the activity type including at least active and inactive classifications; adding the area of the construction zone and the classification to detailed map information of a road map; subsequent to adding the construction zone and the classification to the detailed map information, identifying a second construction object at a given location; identifying, from the detailed map information, the area of the construction zone and the classification based on the given location; operating, at the area of the construction zone, a vehicle having an autonomous driving mode based on the classification stored in the detailed map information; wherein the activity type of the construction zone is classified as active when the characteristics of the construction zone indicate that there have been changes to the roadway as compared to the detailed map information; and wherein when the activity type of the construction zone is classified as active, operating the vehicle based on the classification includes operating the vehicle in a manual driving mode through the area of the construction zone.