TheBridge decks present work aims to investigate in the wind tunnelWind tunnel the characteristics of fluctuating lateral (across-wind) forces acting on a bridge deckBridge decks in terms of magnitude, phase and spanwise correlationSpanwise correlation. Both stationary and aeroelastic conditions at lock-in are considered. A realistic bridge deckBridge decks section inspired by the approaching spans of the Great Belt East Bridge (Denmark) is selected, characterized by a non-streamlined geometry and equipped with traffic barriersTraffic barriers. The experimental study is repeated for various small wind angles of attack. The results show that traffic barriersTraffic barriers increase lateral force spanwise correlationSpanwise correlation. Moreover, the latter at lock-in is much higher than for the stationary model, even though the oscillation amplitude is relatively small. Vortex-induced vibrationsVortex-induced vibration (VIVs) also imply a significant increase in fluctuating lateral force magnitude, which is sensitive to oscillation amplitude and reduced velocity. Finally, the experiments emphasize the key role played by the phase between lateral force and deck motion, which rules VIVVortex-induced vibration peak response amplitude.