In　order　to　identify　the　characteristic　points　and　operating　speeds　for　trucks　at　expressway　tunnel　sections,　the　operating　speed　characteristics　at　tunnel　sections　were　analyzed.　According　to　car　following　tests,　the　driving　behaviors　and　speed　changes　of　trucks　in　varied　length　tunnels　were　studied,　and　the　observation　points　at　tunnel　sections　were　identified.　After　speed　observation,　the　characteristic　points　at　tunnel　sections　were　verified,　the　operating　speed　models　for　the　characteristic　points　were　achieved,　and　the　validities　of　the　models　were　verified.　Analysis　result　shows　that　middle　tunnel　and　short　tunnel　have　little　impacts　on　truck　speed.　200　m　before　tunnel　entrance,　entrance　point　and　100　m　after　exit　are　determined　as　three　characteristic　points　of　operating　speed　for　long　tunnel,　the　relative　errors　of　the　models　are　within　10%,　so　the　models　are　valid.