The present paper was contributed toTwin-box bridge deck the conference workshop entitled “Super Long Span Bridges Through Multi-Box DeckMulti-box decks Solutions” and reports on wind tunnel testsWind tunnel test and analyses carried out to investigate the beneficial effect of the static angle of attack on the aerodynamic stability of a twin-box bridge deckTwin-box bridge deck section and how this effect can be instrumental in achieving longer spans. It is found that the critical wind speed for onset of flutter increases with increasing positive static angles (nose-upNose-up effect) and that this effect relates mainly to a decrease in the loss of aerodynamic stiffness with increasing static angles of attack. It is concluded that it is desirable to design twin-box bridge deckTwin-box bridge deck sections to have a positive moment coefficient at zero angle of attack with a positive decreasing moment slope for increasing nose-up angles. Based on the analysis presented, it is likely that a well-designed twin-box bridge deckTwin-box bridge deck can help secure aerodynamically stable free suspended spans up to 2500 m.