A　recent　study　has　developed　an　integer　linear　program　and　an　exact　algorithm　for　the　automated　truck　transportation　freight　problem　with　lane　reservation.　However,　due　to　its　NP-hard　nature,　their　proposed　method　becomes　difficult　to　solve　large-size　problems　within　acceptable　time.　In　this　paper,　we　firstly　present　an　improved　integer　linear　program　by　adding　valid　inequalities　and　identify　that　its　several　special　cases　are　classical　combinatorial　optimization　problems.　Based　on　analyzed　properties,　a　new　efficient　two-phase　exact　algorithm　is　developed.　Computational　results　on　benchmark　and　new　larger-size　instances　with　up　to　700　nodes　and　55　tasks　show　that　the　new　algorithm　outperforms　very　favorably　the　state-of-the-art　one.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.