Different speed limits in winter and summer.
| Helsinki | 621.000 residents | 40 km/h zones and first 30 km/h zones were introduced in 1987. Extension of 30 km/h zones since 1990. City reduced 50 to 40 km/h, and 40 to 30 km/h in 2004. Two thirds of road network with 30 km/h limits today. |