When coming from Åbyrondellen, you can only go north on E4/Essingeleden, not south. Though, if you come from the tunnel, you can go both north and south. The reason is that the lanes on Årstalänken were rebuilt in November 2020.

Source: https://www.trafikverket.se/vara-projekt/projekt-i-stockholms-lan/testmall-projektsida-liten-att-kopiera2/