On which side are you allowed to pass road maintenance vehicles at work?

You may overtake road maintenance vehicles on whichever side is most suitable. In other words, you are allowed to pass on both the left and right side. Always pass road maintenance vehicles at an appropriate speed and with plenty of sideways clearance.

Remember that it is the driver with the obstacle (for example, a road maintenance vehicle) on his or her side of the road that should stop and give way, if the road is too narrow for two vehicles to proceed at the same time.