Ideally, bees are not transported in the passenger compartment of a car because a few will always fly around inside the car. If doing so, a bee net surrounding the nuc or package is one solution.
Another solution is to wear the bee jacket and veil while driving, but that may obstruct driver’s vision.
Another solution is driving with the windows rolled down or the dash vents aimed to blow bees away from the driver and towards and out the windows.