A method and apparatus for use in traversing a vehicle transportation network may include determining a codeword based on host vehicle information and remote vehicle information, and wherein the codeword indicates whether an expected path for the remote vehicle and an expected path for the host vehicle are convergent, and traversing a portion of the vehicle transportation network in response to the codeword. Determining the codeword may include determining an orientation sector based on a geodesic between the host vehicle and the remote vehicle, determining relative position information for the host vehicle and the remote vehicle based on the orientation sector, determining relative elevation information for the host vehicle and the remote vehicle based on the remote vehicle information and the host vehicle information, and determining relative heading information for the host vehicle and the remote vehicle based on the remote vehicle information and the host vehicle information.