No matter what YOU are still the DRIVER of the vehicle. You never give up that responsibility. Residents use their card or push button to open the Resident gate and enter. Gate Attendants lift the visitor's gate. The gate arms are usually in different positions so that the resident side has a shorter length to drive when entering, than the visitor. If all is equal this allows for traffic to be able to merge in an orderly manner. However, if the resident opens the gate and then delays moving &/or the visitor hits the gas, all bets are off. Yes the attendant should be attempting to blend the movement of both lanes but YOU ARE STILL THE DRIVER.