"20 km/h" there is "30 km/h" and note the road signs ("Road work","Other danger","30 km/h") and the separation of the lanes that starts before Herkulesgatan 17 with Sheraton on the Central brifge ( Centralbron ) that is a one way road to Herkulesgatan and Klaratunneln ( https://sv.wikipedia.org/wiki/Klaratunneln ) that you can get to from the round about ( cirkulationsplatsen ) by Gullmarsplan for longer vehicles like buses and trucks that makes turns in the corners of Klarakvarteren ... 