This　paper　shows　the　quasi-public　goods　characteristic　of　road　in　terms　of　economics,　which　permits　both　government　and　market　to　be　qualified　as　road　providers.　However,　the　existence　of　market　failure　and　government　failure　makes　the　road　resources　not　achieve　the　optimal　structure　and　maximum　public　welfare　with　the　monopolized　road　supply　by　either　of　them.　The　reasons　for　low　efficiency　on　road　resources　supply　and　the　loss　of　social　welfare　are　analyzed,　and　three　road　supply　modes　based　on　the　balance　between　the　government　and　the　market　are　established.　With　the　aim　of　the　maximization　of　public　welfare　of　road　resource,　finally　effective　supply　paths　and　measures　of　road　resources　are　discussed　according　to　different　supply　modes.