The measures are aimed at reducing pedestrian deaths, according to the city, which has conducted a two-year pilot program in selected areas, including Bukchon.
The new measures will take effect on 41 roads in central Seoul, within the Four Gates, as well as the entire stretch of Cheonggyecheon-ro.
The new speed limit will come into effect in July following a three-month grace period.
Pedestrian fatalities account for nearly 70 percent of all traffic-related deaths in the central Seoul area, according to the city.
By Choi Ji-won (firstname.lastname@example.org)