Greek National Road 89 is a highway that goes from Koropi to Lavrio as a continuation of the Attiki Odos route. It starts from the Airport intersection near Koropi and ends at the Lavrio port. It has two lanes per direction. It has 6 traffic lights, making it more like an urban avenue rather than a highway. However there are plans to construct junctions to replace the traffic lights and generally upgrade the road to motorway standards, making an extension of Attiki Odos.