Regional　urban　networks　are　increasingly　interconnected　due　to　the　continuous　flow　of　traffic,　so　it　is　of　great　significance　to　establish　a　reasonable　node　importance　evaluation　method　in　static　road　network　topology.　Firstly,　this　paper　proposes　to　consider　the　traffic　characteristic　parameter　index,　selected　six　indexes　which　encircled　by　node　degree,　node　betweenness,　clustering　coefficient,　road　width,　traffic　flow,　and　delay.　The　evaluation　indicator　system　of　topological　characteristics　of　the　urban　road　network　is　constructed.　Secondly,　based　on　the　grey　relation　analysis　method,　the　paper　analyzed　the　relational　grade　of　the　road　network　area　under　the　influence　of　the　index　weighting　and　established　the　evaluation　method　of　the　node　importance　of　the　road　network　in　the　urban　area.　Finally,　the　importance　of　the　regional　road　network　is　calculated.　The　introduction　of　the　road　network　operation　index　is　helpful　to　the　analysis　of　the　topological　characteristics　of　the　urban　road　network　and　makes　it　more　scientific　and　accurate　to　extract　roads　with　a　high　relational　grade　in　the　region,　so　that　traffic　managers　can　take　more　targeted　traffic　management　measures,　which　plays　an　important　role　in　improving　the　reliability　of　the　road　network.　©　2020　ASCE.