This　study　investigated　and　analyzed　14　bus　turnout　stops　and　7　curb-lane　bus　stops　of　expressways,　major　arterials　and　minor　arterials　in　Beijing.　Based　on　this　observation,　the　statistic　relationship　between　bus　arrival　rate　and　bus　influence　time　for　each　type　of　bus　stop　was　found.　Then,　by　considering　the　relationship,　and　a　theoretic　model　of　bus　influence　time　and　roadway　section　capacity　was　set　up.　Finally,　two　types　of　roadway　section　capacity　theoretic　model　were　established,　which　reflect　the　effect　of　bus　arrival　rate　of　two　different　type　of　bus　stop　on　road　section　capacity.