An intention of a road user to traverse a passage between a first vehicle and a second vehicle is determined. A required width of the passage is determined based on a nature of the road user. A current width of the passage is determined. Upon determining the current width of the passage is less than the required width of the passage, a drive of at least one of the first vehicle or the second vehicle is actuated to increase the current width of the passage at least to the required width of the passage.