Content　dissemination　and　routing　are　crucial　issues　in　VSNs.　Content　dissemination　is　distributing　contents　to　users　or　areas　of　interest　while　routing　is　delivering　messages　to　target　users/locations.　How　to　achieve　efficient　content　dissemination　and　routing　in　VSNs　has　attracted　a　lot　of　attention　and　much　work　has　been　carried　out.　Existing　work　in　this　area　has　mainly　considered　various　characteristics　of　VSNs　such　as　centrality,　community,　social　ties,　mobility　pattern,　context　information,　and　so　on.　In　this　article,　we　present　a　survey　of　state-of-theart　protocols　in　this　area.　We　first　discuss　how　VSNs　differ　from　traditional　vehicular　ad　hoc　networks　and　also　mobile　social　networks　from　a　networking　perspective.　We　then　introduce　typical　structures　of　VSNs　and　their　social　properties,　which　have　a　big　impact　on　the　performance　of　content　dissemination　and　routing　in　such　networks.　We　then　divide　existing　protocols　based　on　different　design　criteria.　We　introduce　how　each　of　the　protocols　works　and　discuss　their　merits　and　deficiencies.　Finally,　we　point　out　some　open　issues　in　this　area.