A method, a system, and a computer program product are provided for determining roadwork extension data for identification of at least one roadwork extension. The method, for example, includes clustering a first plurality of lane marking observations captured by a plurality of vehicles, based on a lane marking location and a lane marking heading of each of the first plurality of lane marking observations to generate at least one lane marking cluster and map-matching the lane marking cluster to one or more links to obtain one or more map-matched links. The method further includes searching for one or more missing links associated with each of the map-matched links based on link attributes of the map-matched links and a distance threshold and generating the roadwork extension data based on the map matched links and the missing links.