When　an　emergency　occurs　in　a　city,　it　causes　a　large　accumulation　of　vehicles　on　the　roads.　It　is　particularly　important　to　provide　effective　emergency　route　planning　decisions　for　vehicles.　To　make　vehicle　evacuation　more　effective　and　mitigating　traffic　congestion,　a　Grid　Map　Emergency　Route　Planning　(GMERP)　methodology　is　designed.　In　particular,　we　first　divide　the　road　network　into　multiple　grids　and　use　the　connectivity　between　the　grids　and　the　commuting　capacity　of　the　road　as　the　weight　of　the　grid.　Then,　a　Grid　Map　Evacuation　Area　Recommendation　(GM-EAR)　method　is　introduced　by　considering　the　road　speed,　which　calculates　the　commuting　capacity　of　the　raster　through　a　sorting　algorithm　and　recommends　the　raster　with　stronger　computing　capacity　as　the　evacuation　area.　To　allow　more　vehicles　to　reach　the　evacuation　area　in　a　short　time,　when　planning　a　path,　an　Emergency　Route　Planning　Analytic　Hierarchy　Process　(ERP-AHP)　method　is　introduced.　The　ERP-AHP　calculates　the　road　weight　by　taking　into　account　the　factors　that　affect　the　road　traffic　comprehensively　so　that　the　planned　route　has　better　evacuation　ability.　The　experimental　results　show　that　the　GMERP　model　can　effectively　evacuate　vehicles　around　the　congested　area.　©　2021,　Springer　Nature　Switzerland　AG.