System, methods, and other embodiments described herein relate to identifying lane obstructions. In one embodiment, a method includes collecting, in an electronic data store, position data of surrounding vehicles observed by reporting vehicles that travel over a roadway segment. The method includes analyzing the position data to identify whether observed positions correlate with an obstruction pattern that is indicative of a lane obstruction in at least one lane of the roadway segment. The method includes, in response to determining the position data indicates the lane obstruction, providing a signal identifying the lane obstruction to oncoming vehicles of the roadway segment.